ADVANCE FLYING ACADEMY

BOEING 737 FULL PILOT TRAINING COURSE STEP BY STEP

EXTERIOR INSPECTION

Either the Captain, First Officer or IRO will conduct the Exterior Inspection.

The recommended sequence is to start at the left forward fuselage and proceed in a clockwise direction. During the walk around, observe the general condition of all surfaces, fuselage, empennage, wings, windows, antennas, flight controls, engines, and cowlings. Check particularly for damage, fluid leakage, proper

position, and security of access panels. Also verify that crew, passengers, and

cargo doors, which are not in use, are closed and the door handles recessed.

Check all external lights are clean, with undamaged lenses. Check operation of

navigation / position lights. Check potable water and lavatory fill and drain areas for leakage. If evidence of leakage is found, notify maintenance.

Note:

If evidence of fluid leakage or stains is noted at the forward and/or aft lavatory service panel, ground personnel must verify if a leak exists

before departure. If a leak is present, repairs must be made, or the affected lavatory must be drained and placarded inoperative.

Prior to conducting the exterior inspection, the aircraft will be configured as follows:

• Parking brake set.

• Fuel system pressurized.

• Caution: Center tank fuel pumps must be OFF unless personnel are available on the flight deck to monitor LOW PRESSURE lights.

• Hydraulic systems pressurized.

• Wheel well lights ON.

• Position lights ON.

When operationally efficient during crew changes, the exterior inspection may be accomplished while waiting for passengers and crew to deplane. When this is done, the requirements of the exterior inspection preamble still apply except that the parking brake may be off, and the hydraulic systems may be unpressurized.

WARNING:

If thrust reverser levers are not in the stowed position, check with Maintenance prior to pressurizing hydraulic systems.

WARNING:

Check flap handle in agreement with position indicator prior to pressurizing hydraulics.

Boeing 737 Nose Section Exterior Inspection

The nose section inspection of the Boeing 737 is the first and one of the most critical steps in the exterior walk-around. This area contains essential flight sensors, cockpit windows, and structural components that directly affect aircraft performance and safety.

A thorough inspection helps detect:

Sensor blockages
Structural damage
Missing covers or contamination

Inspection Overview

The inspection should be performed from top to bottom and left to right, starting with a general visual scan and then moving closer for detailed checks.

1. Radome (Nose Cone)

The radome protects the weather radar system.

Check for:

Cracks, dents, or surface damage
Loose or missing fasteners
Smooth and secure attachment

Why it matters:
Damage to the radome can affect weather radar accuracy, which is critical for flight safety.

2. Windshields (Cockpit Windows)

Inspect:

Cracks, chips, or delamination
Dirt, oil, or contamination
Proper sealing around edges

Why it matters:
Clear, undamaged windshields ensure pilot visibility and structural integrity during pressurization.

3. Pitot Tubes

Check:

No covers installed (remove before flight)
Openings are clean and unobstructed
Secure mounting

Why it matters:
Pitot tubes provide airspeed data. Blockage can lead to unreliable airspeed indications.

4. Static Ports

Inspect:

Clean and free from dirt, tape, or insects
No dents or deformation around ports

Why it matters:
Static ports measure atmospheric pressure, essential for altitude and airspeed calculations.

5. Total Air Temperature (TAT) Probe

Check:

Probe is clean and undamaged
No protective cover installed

Why it matters:
The TAT probe provides air temperature data, influencing engine and performance calculations.

6. Angle of Attack (AOA) Sensor

Inspect:

Vane moves freely
No bending or physical damage
Secure attachment

Why it matters:
AOA sensors are critical for stall warning and flight control systems.

7. Taxi Light

Check:

Lens is clean and not cracked
Proper alignment and condition

Why it matters:
Ensures adequate visibility during taxi operations, especially at night or low visibility.

8. Nose Access Panels and Compartments

Inspect:

All panels closed and latched
No signs of damage or missing fasteners

Why it matters:
Loose panels can cause aerodynamic issues or in-flight damage.

9. General Nose Area Check

Perform a final scan of the nose section:

No fluid leaks
No foreign object debris (FOD)
No bird strikes or impact damage
All components appear secure and intact

Safety Tips

Always remove protective covers (pitot, TAT) before flight
Never touch sensitive probes unnecessarily
Report any abnormal findings immediately
Follow company and manufacturer procedures

Conclusion

The Boeing 737 nose section inspection is vital because it includes critical flight instruments and structural components. A careful and systematic check ensures accurate data for the flight deck and contributes directly to safe flight operations.

Boeing 737 Nose Landing Gear Inspection

1. Introduction

The nose landing gear (NLG) of the Boeing 737 is a critical structural and steering component that supports aircraft weight during ground operations, taxiing, takeoff, and landing. A thorough inspection ensures airworthiness, safety, and proper steering performance.

Routine inspections are carried out during:

Preflight walkaround
Transit checks
Line maintenance (A-checks)
Heavy maintenance inspections

2. Safety Precautions

Before starting inspection:

Ensure aircraft is properly chocked
Confirm hydraulic systems are depressurized (if required)
Avoid contact with hazardous materials
Use proper PPE (gloves, eye protection)

3. General Visual Inspection

Perform an overall visual scan of the nose landing gear area:

Look for damage, corrosion, cracks, or deformation
Check for hydraulic fluid leakage
Ensure area is clean and free from foreign objects

4. Nose Wheel and Tires

Inspect tires for:
- Wear and tread condition
- Cuts, bulges, or foreign object damage
Check wheel rims:
- No cracks or corrosion
- Proper condition and cleanliness

5. Nose Gear Strut (Shock Absorber)

Verify strut extension:
- Not fully compressed
- Correct extension visible (as per aircraft limits)
Check for:
- Hydraulic leaks
- Surface damage or scoring

6. Torsion Links (Scissors)

Inspect upper and lower torsion links:
- Secure attachment
- Locking hardware (cotter pins) installed
Check for:
- Wear, cracks, or looseness

7. Steering System

Inspect nose wheel steering assembly:
- Hydraulic actuators/cylinders
- Steering linkages
Ensure:
- No leakage
- No abnormal wear or misalignment

8. Nose Gear Doors

Check gear doors:
- Secure attachment
- Hinges and linkages in good condition
Ensure:
- No structural damage
- Proper alignment

9. Safety Pins and Indicators

Verify:
- Downlock pin removed before flight
- Steering bypass pin correctly positioned (installed for towing, removed for flight)
Confirm gear indication markings (if visible) are aligned

10. Taxi Light (if installed on gear)

Inspect:
- Light lens condition
- No cracks or discoloration
Ensure proper mounting and cleanliness

11. Wheel Well Area

Check inside nose wheel well:
- No fluid leaks
- No loose components or wiring
- Clean structure and fittings

12. Additional Structural Inspection

During detailed maintenance:

Inspect:
- Actuator attachments
- Support structures
- Bushings and seals
Look for:
- Cracks
- Corrosion
- Paint peeling (possible sign of underlying damage)

13. Common Defects to Watch

Hydraulic leaks from strut or steering actuators
Tire wear or damage
Loose or missing fasteners
Structural cracks in support fittings
Corrosion in exposed metal areas

14. Conclusion

A proper Boeing 737 nose landing gear inspection ensures:

Safe taxi and steering control
Proper shock absorption during landing
Early detection of structural or hydraulic issues

Consistent and detailed inspections are essential to maintain flight safety, reliability, and regulatory compliance.

Right Fuselage & Wing Root Section

Introduction

The right fuselage and wing root section of the Boeing 737 is a structurally critical area where the wing integrates with the aircraft body. This zone is subjected to significant aerodynamic loads, vibration, and pressurization stresses during flight. A thorough exterior inspection ensures structural integrity, early detection of defects, and continued airworthiness.

1. Fuselage Skin Inspection

The fuselage skin must be carefully examined for:

Dents, scratches, or buckling
Cracks, especially around lap joints and rivet lines
Corrosion or paint deterioration

Special attention should be given to areas near structural frames and stringers, as stress concentrations often develop here.

2. Service Doors & Access Panels

Inspect all service doors and panels for:

Proper alignment and secure latching
Condition of seals to prevent pressurization leaks
Missing or loose fasteners

Improperly secured panels can lead to aerodynamic drag or potential in-flight hazards.

3. Cabin Windows

Check each window for:

Cracks, crazing, or delamination
Seal integrity and cleanliness

Defects in windows may compromise cabin pressurization and passenger safety.

4. Wing Root Fairing

The wing root fairing smooths airflow between the wing and fuselage. Inspect for:

Cracks, deformation, or gaps
Loose or missing fasteners
Signs of fluid leakage or dirt accumulation indicating hidden damage

5. Leading Edge (Wing Root Area)

Examine the leading edge near the wing root for:

Dents, nicks, or corrosion
Secure attachment and smooth surface condition
Proper sealing to prevent moisture ingress

This area is highly exposed to environmental impact and foreign object damage (FOD).

6. Flap Track Fairings

Flap track fairings should be checked for:

Structural damage or cracks
Loose panels or attachment hardware
Smooth aerodynamic contour

These components protect flap mechanisms and reduce drag.

7. Engine Pylon

The engine pylon connects the engine to the wing and must be inspected for:

Cracks, corrosion, or deformation
Security of access panels
Hydraulic or fuel leaks

Any abnormality here is critical and must be addressed immediately.

8. Engine Nacelle (Right)

Inspect the nacelle for:

Dents, cracks, or panel misalignment
Condition of latches and hinges
Inlet lip damage and cleanliness

A damaged nacelle can affect engine performance and airflow efficiency.

9. Lower Fuselage Skin

The lower fuselage area is prone to contamination and moisture. Check for:

Fluid leaks (oil, hydraulic, or fuel)
Corrosion, stains, or dents
Condition of antennas and static ports

Ensure static ports are unobstructed for accurate instrument readings.

General Inspection Notes

Perform inspections in adequate lighting conditions
Use proper access equipment when required
Follow standard safety precautions and procedures
Record and report all discrepancies according to maintenance guidelines

Conclusion

The right fuselage and wing root inspection on the Boeing 737 is a vital part of routine aircraft maintenance. Early identification of defects such as cracks, corrosion, or loose components helps prevent serious structural issues, ensures compliance with aviation regulations, and guarantees safe aircraft operation.

Consistent and systematic inspections not only enhance reliability but also extend the service life of the aircraft.

Boeing 737 Exterior Inspection – Right Wing Section

The right wing of a Boeing 737 is a critical structural and aerodynamic component that houses fuel, control surfaces, and lift-generating elements. A thorough exterior inspection ensures flight safety, structural integrity, and system reliability. Below is a practical, step-by-step guide focused on the right wing section.

1. Inspection Preparation

Before approaching the wing:

Confirm aircraft is properly parked, chocked, and safe.
Ensure adequate lighting conditions.
Maintain safe distance from engine intake and exhaust areas.
Follow operator and company procedures.

2. Wing Root & Fairing Area

The inspection begins at the wing root, where the wing connects to the fuselage.

Check for:

Secure attachment of fairings
No visible cracks, dents, or corrosion
Signs of fluid leaks (fuel, oil, or hydraulic fluid)
Proper panel alignment and fastener condition

This area is structurally critical, so even minor damage should be reported.

3. Center Wing (Upper & Lower Surfaces)

Move outward along the wing surface.

Inspect:

Skin condition (no wrinkles, dents, cracks)
Rivets and fasteners (no missing or loose fittings)
Evidence of fuel seepage or staining
General cleanliness and surface integrity

The center wing also contains fuel tanks, making leak detection especially important.

4. Flap Track Fairings

Located beneath the trailing edge, these aerodynamic covers protect flap mechanisms.

Check for:

Structural condition (no cracks or deformation)
Secure mounting and alignment
Missing or loose fasteners

Damage here can affect drag and performance.

5. Flaps

Flaps are essential for lift during takeoff and landing.

Inspect:

Surface condition and edges
Signs of excessive wear or damage
Proper alignment and sealing

Ensure there are no obstructions or contamination affecting movement.

6. Aileron

The aileron controls roll movement of the aircraft.

Check:

Freedom of movement (if applicable visually)
Hinge condition and attachment points
No visible damage, chafing, or missing hardware

Even small defects can impact flight control responsiveness.

7. Wingtip / Winglet

At the outermost section of the wing:

Inspect:

Structural integrity (no cracks or deformation)
Secure attachment
Navigation and strobe lights (condition and cleanliness)

Winglets improve fuel efficiency, so aerodynamic condition is important.

8. General Inspection Notes

Always look for leaks, corrosion, dents, and missing fasteners
Ensure all panels and access doors are properly closed
Report any abnormal findings immediately
Follow standard maintenance and safety procedures

Conclusion

A detailed right wing inspection on the Boeing 737 is essential for ensuring safe operations. By systematically moving from the wing root to the wingtip and carefully examining each component, inspectors can detect early signs of wear or damage and prevent potential in-flight issues.

Boeing 737 Exterior Inspection – Right Engine Section

The right engine inspection on a Boeing 737 is a critical part of the exterior walk-around. It ensures the engine is free from visible damage, leaks, or conditions that could affect safe operation. This inspection should always be performed methodically and in accordance with company procedures and the Aircraft Maintenance Manual (AMM).

1. Safety Precautions

Before approaching the engine:

Ensure engine is shut down and fan blades are stationary
Confirm no ground hazards (FOD, fuel spills, equipment)
Maintain safe distance from intake and exhaust areas
Use proper Personal Protective Equipment (PPE)

2. Pylon and Wing Fairing

Inspect the area where the engine attaches to the wing:

Check for cracks, dents, or corrosion
Look for loose or missing fasteners
Inspect for fluid leaks (oil, fuel, hydraulic)

3. Engine Cowling (External Panels)

Upper Forward Cowling

Check for dents, cracks, and panel security
Ensure latches are properly secured

Mid Section Cowling

Inspect for structural distortion or damage
Verify fasteners are intact

Lower Aft Cowling

Look for oil or fluid leakage
Check for missing or loose panels

4. Access Panels and Doors

Ensure all panels are properly closed and latched
Check for signs of leakage or staining
Inspect panel edges for wear or misalignment

5. Engine Inlet (Intake Area)

Inlet Lip

Check for nicks, dents, cracks, or erosion
Ensure smooth surface with no structural damage

Inner Inlet Surface

Inspect for debris or foreign object damage (FOD)

6. Fan Blades

Carefully observe the fan inside the intake:

Check each blade for:
- Cracks or bends
- Nicks or dents
- Erosion or wear
Ensure blades are clean and free of foreign objects

7. Spinner (Nose Cone)

Inspect for damage, cracks, or dents
Ensure secure attachment
Check for missing fasteners

8. Lower Engine Area

Look underneath the engine for:
- Oil, fuel, or hydraulic leaks
- Drips or wet areas
Inspect for unsecured components or panels

9. General Condition Check

Ensure the engine is overall clean and intact
Look for unusual wear patterns
Check for any abnormal smells (fuel or oil)

10. Reporting

If any abnormality is found:

Record it according to the Minimum Equipment List (MEL)
Refer to the Aircraft Maintenance Manual (AMM)
Notify maintenance personnel immediately

Conclusion

A thorough right engine inspection on the Boeing 737 helps prevent in-flight issues and ensures operational safety. Attention to detail—especially in areas like fan blades, inlet, and cowling—can identify early signs of damage or wear before they become critical.

Boeing 737 Exterior Inspection – Right Main Landing Gear (Step-by-Step Guide)

Preparation (Before Step 1)

Aircraft on level ground
Parking brake set
Wheel chocks installed
Area clear and safe to approach

Step 1 – Shock Strut (Oleo Strut)

Inspection Focus: Structural condition and servicing level

Check strut extension is within normal limits
Inspect for hydraulic fluid leaks
Examine chrome surface for:
- Scratches
- Pitting or corrosion
Verify upper and lower attachment points are secure

Step 2 – Side Strut

Inspection Focus: Structural integrity

Check for:
- Cracks
- Bends or deformation
Ensure all bolts and fasteners are secure
Confirm proper alignment with main strut

Step 3 – Drag Strut (Drag Brace)

Inspection Focus: Locking and support structure

Inspect for cracks or distortion
Verify downlock mechanism is properly engaged
Check hinge points and fittings for wear or looseness

Step 4 – Torque Links (Scissor Links)

Inspection Focus: Alignment and connection

Ensure torque links are:
- Properly connected
- Not twisted or misaligned
Check for:
- Cracks
- Excessive wear
Verify bolts, bushings, and locking devices

Step 5 – Wheel and Tire Assembly

Inspection Focus: Tire condition and wheel integrity

Inspect tires for:
- Cuts, bulges, or embedded debris
- Uneven or excessive wear
Check tire inflation (visual condition)
Inspect wheel rims for:
- Cracks or corrosion
Ensure wheel nuts and fasteners are secure

Step 6 – Brake Assembly

Inspection Focus: Brake condition and leaks

Check for hydraulic leaks around brakes
Inspect brake wear indicators (within limits)
Examine brake discs for:
- Damage
- Overheating signs (discoloration)
Check brake lines and fittings for security

Step 7 – Landing Gear Doors & Fairings

Inspection Focus: External structure

Inspect for:
- Dents or cracks
- Loose or missing fasteners
Ensure doors and fairings are:
- Properly aligned
- Securely attached

Step 8 – General Area Check

Inspection Focus: Overall condition

Look for:
- Hydraulic leaks
- Loose hardware
- Corrosion
Check hydraulic lines for:
- Chafing or damage
Ensure no foreign object debris (FOD) is present
Inspect wiring, sensors, and surrounding structure

Final Check (After Step 8)

Confirm all components are secure and normal
Ensure area is clear of tools and equipment
Report any defects in the maintenance logbook
Verify all panels/doors are closed and secured

Safety Note ⚠️

Do NOT enter the landing gear wheel well or place any part of your body inside the gear area unless it is properly secured—serious injury may occur.

Boeing 737 Exterior Inspection – Wing Tip & Trailing Edge (Step-by-Step Guide)

Preparation (Before Step 1)

Aircraft on level ground
Parking brake set
Area clear of personnel and equipment
Be cautious around flight control surfaces

Step 1 – Wing Tip / Winglet

Inspection Focus: External condition and lighting

Check wing tip/winglet for:
- Cracks, dents, or corrosion
- Paint damage
Inspect navigation/strobe light:
- Clean and undamaged
- Secure attachment
Ensure no loose panels or fasteners

Step 2 – Upper Wing Surface

Inspection Focus: Surface condition

Look for:
- Dents, scratches, or corrosion
- Paint peeling or damage
Check for:
- Loose or missing fasteners
- Fluid stains or leaks
Ensure surface is clean and free of debris

Step 3 – Spoilers

Inspection Focus: Panels and condition

Inspect spoiler panels for:
- Cracks or dents
- Proper seating (flush with wing)
Ensure:
- No missing fasteners
- No visible obstruction
Perform visual check for proper condition (no abnormal position)

Step 4 – Aileron

Inspection Focus: Control surface condition

Check aileron for:
- Damage, dents, or corrosion
Verify:
- Hinges are secure
- No excessive free play
Ensure proper alignment with trailing edge
Confirm surface appears free to move (visual check only)

Step 5 – Flap Track Fairings

Inspection Focus: External fairing condition

Inspect fairings for:
- Cracks, dents, or deformation
Ensure:
- Secure attachment
- Proper alignment
Check for missing or loose fasteners

Step 6 – Lower Wing Surface

Inspection Focus: Underside condition

Check for:
- Hydraulic leaks or fluid stains
- Corrosion or skin damage
Inspect panels and fasteners:
- Secure and intact
Ensure no foreign object debris (FOD)

Step 7 – Trailing Edge Panels

Inspection Focus: Structure and sealing

Inspect panels for:
- Cracks, dents, or corrosion
Check:
- Panel alignment
- Gaps or irregular spacing
Ensure seals are intact and properly seated

Final Check (After Step 7)

Ensure all components are:
- Secure
- Free of visible defects
Confirm no tools, debris, or loose items remain
Report any discrepancies in the aircraft maintenance logbook

Safety Note ⚠️

Do NOT place hands or body near control surfaces (ailerons, spoilers, flaps), as movement can occur and cause serious injury.

Boeing 737 Exterior Inspection – Aft Fuselage (Step-by-Step Guide)

Preparation (Before Step 1)

Aircraft on level ground
Parking brake set
Area clear and safe
Be cautious around tail section and control surfaces

Step 1 – Vertical Stabilizer (Fin)

Inspection Focus: Structural condition

Check for:
- Cracks, dents, or corrosion
- Paint damage or peeling
Inspect leading and trailing edges:
- Smooth and free from damage
Ensure all panels and fasteners are secure

Step 2 – Horizontal Stabilizer

Inspection Focus: Surface and alignment

Inspect for:
- Damage, dents, or corrosion
Check:
- Fasteners are secure
- Proper alignment
Ensure no visible obstruction or abnormal condition

Step 3 – APU Exhaust

Inspection Focus: Exhaust condition

Inspect exhaust area for:
- Cracks or deformation
- Burn marks or overheating signs
Check for:
- Carbon buildup
- Oil or fluid leakage
Ensure exhaust outlet is clear

Step 4 – APU Access Door

Inspection Focus: Door condition and security

Check door for:
- Dents or structural damage
Inspect:
- Hinges and latches
Ensure door is:
- Properly closed
- Securely latched

Step 5 – Pressure Relief Valve

Inspection Focus: Venting system

Inspect valve area for:
- Damage or corrosion
Ensure outlet is:
- Clean and unobstructed
Check for any signs of leakage

Step 6 – Aft Fuselage Skin

Inspection Focus: External structure

Inspect fuselage skin for:
- Cracks, dents, or corrosion
- Paint condition
Check:
- Panel alignment
- Fasteners are secure
Look for fluid streaks or stains

Step 7 – Antennas & Fairings

Inspection Focus: External components

Inspect antennas for:
- Damage or bending
Check fairings for:
- Cracks or looseness
Ensure:
- All components are securely attached
- No missing fasteners or gaps

Final Check (After Step 7)

Ensure all inspected areas are:
- Secure
- Free from visible defects
Confirm no tools or foreign objects remain
Record any discrepancies in the aircraft maintenance logbook

Safety Note ⚠️

Do NOT stand close to or under the tail section when systems may be active. Movement of control surfaces or APU operation can pose serious hazards.

Boeing 737 Exterior Inspection – Tail Section (Step-by-Step Guide)

Preparation (Before Step 1)

Aircraft on level ground
Parking brake set
Area clear and safe
Maintain safe distance from control surfaces and APU area

Step 1 – Vertical Stabilizer (Fin)

Inspection Focus: Structural integrity

Check for:
- Cracks, dents, or corrosion
- Paint damage or peeling
Inspect leading and trailing edges:
- Smooth and undamaged
Ensure all panels and fasteners are secure

Step 2 – Rudder

Inspection Focus: Control surface condition

Inspect rudder for:
- Damage, dents, or corrosion
Check:
- Hinges and attachment points
- Fasteners are secure
Ensure rudder is:
- Properly aligned
- Free to move (visual check only)

Step 3 – Horizontal Stabilizer

Inspection Focus: Structure and alignment

Inspect for:
- Cracks, dents, or corrosion
Verify:
- Secure attachment
- Proper alignment
Check surface condition for smoothness

Step 4 – Elevator

Inspection Focus: Control surface condition

Inspect elevator for:
- Damage or deformation
Check:
- Hinges and linkage points
- Fasteners are secure
Ensure elevator appears:
- Properly aligned
- Free to move (visual check only)

Step 5 – Trim Tab (Elevator Tab)

Inspection Focus: Fine control surface

Inspect trim tab for:
- Damage or bending
Check hinge condition and attachment
Ensure:
- Proper alignment with elevator
- No looseness or excessive play

Step 6 – APU Exhaust

Inspection Focus: Exhaust and surrounding area

Inspect for:
- Cracks or deformation
- Burn marks or heat damage
Check for:
- Carbon buildup
- Oil or fluid leaks
Ensure exhaust outlet is:
- Clear and unobstructed

Final Check (After Step 6)

Ensure all components are:
- Secure
- Free of visible defects
Confirm no tools or foreign objects remain
Record any discrepancies in the aircraft maintenance logbook

Safety Note ⚠️

Do NOT stand close to the tail when systems are active. Movement of the rudder, elevator, or trim tab can occur without warning and may cause serious injury.

Boeing 737 Exterior Inspection — Left Wing Section (Step-by-Step Guide)

The left wing inspection of a Boeing 737 is a critical part of the exterior walk around. This section ensures structural integrity, aerodynamic efficiency, and overall flight safety. Below is a clear, professional breakdown based on the inspection points shown in the image.

🔍 Inspection Purpose

The goal is to identify:

Structural damage (cracks, dents, corrosion)
Fluid leaks (fuel, oil, hydraulic)
Loose or missing fasteners
Any abnormal condition affecting airworthiness

✈️ Step-by-Step Left Wing Inspection

1. Wing Root / Fuselage Fairing

Check the connection area between wing and fuselage
Look for cracks, gaps, or loose fasteners
Ensure sealing is intact (no leaks or deterioration)

2. Leading Edge

Inspect for dents, nicks, or erosion
Check for bird strike or debris impact
Surface should be smooth and undamaged

3. Upper Wing Surface

Look for:
- Wrinkles or deformation
- Corrosion or contamination
- Fuel leaks or stains
Surface should be clean and smooth

4. Trailing Edge (Flaps / Flaperons)

Check flap panels and alignment
Inspect for:
- Damage or gaps
- Actuator fairing condition
Ensure components are secure and properly aligned

5. Spoilers (Upper Wing Surface)

Examine spoiler panels, hinges, and actuators
Check surrounding skin for damage
Ensure no hydraulic leaks and proper seating

6. Slats (Leading Edge Devices)

Inspect slat panels and tracks
Check seals and drive mechanisms
Ensure no visible damage or leaks

7. Pylon (Left Engine Attach Point)

Inspect structural integrity of the pylon
Check fairings and fasteners
Look carefully for oil or fuel leaks around attachment area

8. Flap Track Fairings (Under Wing)

Inspect fairings for:
- Cracks or damage
- Proper alignment
- Secure attachment
These aerodynamic covers must be intact

9. Winglet

Check winglet surface for:
- Cracks or erosion
- Lightning strike marks
- Loose fasteners
Ensure it is firmly attached and undamaged

⚠️ General Inspection Notes

Always inspect from wing root to wingtip
Use proper lighting and access equipment if needed
Report any abnormal findings immediately
Follow the Aircraft Maintenance Manual (AMM) for limits and procedures

🛑 Safety First

Ensure aircraft is in a safe condition before inspection
Maintain safe distance from moving components
Be aware of fuel hazards and slippery surfaces

✅ Summary

A thorough left wing inspection of the Boeing 737 ensures:

Safe flight operations
Early detection of defects
Compliance with aviation maintenance standards

Boeing 737 Exterior Inspection — Left Engine Section (Step-by-Step Guide)

The left engine inspection on a Boeing 737 is a vital part of the exterior walk around. It focuses on detecting damage, leaks, or abnormalities that could affect engine performance, safety, and airworthiness.

🔍 Inspection Purpose

The inspection aims to identify:

Structural damage (dents, cracks, corrosion)
Fluid leaks (oil, fuel, hydraulic)
Foreign Object Damage (FOD)
Loose or missing fasteners

✈️ Step-by-Step Left Engine Inspection

1. Engine Inlet Cowl (Lip / Front Section)

Check for dents, cracks, or nicks
Inspect for corrosion or erosion
Ensure no loose fasteners
Confirm area is free from FOD

2. Fan Blades & Spinner

Inspect fan blades for:
- Nicks, dents, or leading-edge erosion
- Signs of impact or debris ingestion
Check spinner cone for cracks or damage
Ensure blades are clean and intact

3. Inlet Cowl (Inner Surface)

Examine inner surface for:
- Scratches or abrasion
- Cracks or structural damage
Check for loose or missing fasteners

4. Upper Engine Cowl (Access Panels)

Verify access panels are:
- Properly aligned
- Securely latched
Check for leaks around panel edges

5. Engine Cowl (Outer Surface)

Inspect outer nacelle surface for:
- Dents, wrinkles, or cracks
- Paint damage or corrosion
Ensure all fasteners are secure

6. Aft Engine Cowl (Exhaust Section)

Check for:
- Heat damage or distortion
- Cracks or loose fasteners
- Soot streaks indicating exhaust leaks
Area should be clean and structurally sound

7. Pylon & Fairings

Inspect pylon structure connecting engine to wing
Check fairings for:
- Cracks or damage
- Secure attachment
Look for oil or fuel leaks around fittings

8. Thrust Reverser (Cascade & Duct)

Inspect cascade vanes for dents or damage
Check actuator fairings and duct condition
Ensure all components are secure and aligned

⚠️ General Inspection Notes

Inspect from front to rear and top to bottom
Use proper lighting for internal areas
Report any abnormal findings immediately
Follow the Aircraft Maintenance Manual (AMM) limits and procedures

🛑 Safety First

Ensure engine is fully shut down before inspection
Be cautious of:
- Sharp edges
- Hot surfaces
- Moving components
Ensure area is clear of FOD and hazards

🚨 Typical Discrepancies to Report

Oil or fuel leaks
Cracked or damaged cowling
Loose or missing fasteners
Fan blade damage
Unsecured panels or fairings
Evidence of FOD

✅ Summary

A proper left engine inspection on the Boeing 737 helps ensure:

Reliable engine performance
Early detection of faults
Compliance with aviation safety standards

Boeing 737 Exterior Inspection — Left Main Landing Gear Section (Step-by-Step Guide)

The left main landing gear inspection on a Boeing 737 is essential for ensuring safe ground operations, takeoff, and landing. This area carries significant structural loads, so even minor discrepancies must be identified and addressed.

🔍 Inspection Purpose

The objective is to detect:

Hydraulic leaks
Structural damage or cracks
Tire wear or improper inflation
Loose or missing fasteners
Wear in moving components

✈️ Step-by-Step Left Main Landing Gear Inspection

1. Shock Strut (Upper Section)

Check for:
- Hydraulic fluid leaks
- Dents, cracks, or corrosion
Ensure proper attachment and cleanliness

2. Side Strut

Inspect for cracks or deformation
Check attachment points and structural condition
Ensure no corrosion or damage

3. Drag Brace

Verify structural integrity
Check for cracks, corrosion, or bending
Ensure secure attachment

4. Trunnion / Torque Links & Attach Points

Inspect for:
- Wear or excessive play
- Cracks or loose fasteners
Ensure all connections are secure

5. Tires & Wheels

Check tires for:
- Cuts, bulges, or flat spots
- Proper inflation
Inspect wheels for cracks or damage

6. Gear Door & Door Support

Check door panels and hinges
Ensure actuators are secure
Look for leaks or structural damage

7. Uplock Actuator

Inspect actuator for leaks or damage
Ensure secure mounting
Verify smooth mechanical condition

8. Landing Gear Links & Fittings

Check links, pins, and fittings for:
- Wear or cracks
- Proper safety locking (safeties installed)

9. Hydraulic Lines & Fittings

Inspect for:
- Fluid leaks
- Chafing or damage
Ensure clamps and routing are secure

10. Shock Strut (Lower Section)

Check for:
- Proper extension (oleo condition)
- Leaks or contamination
Surface should be clean and smooth

11. Brake Assembly

Inspect brake units for:
- Wear and condition
- Hydraulic leaks
Ensure components are secure

12. Wheel Chocks

Confirm chocks are correctly positioned during inspection
Ensure removal after completion (if required)

⚠️ General Inspection Notes

Inspect from front, rear, inboard, and outboard sides
Use proper lighting and access tools
Report all discrepancies according to procedures
Refer to the Aircraft Maintenance Manual (AMM) for limits

🛑 Safety First

Ensure aircraft is on level ground with parking brake set
Confirm landing gear is fully down and locked
Keep clear of the wheel well area
Watch for hydraulic pressure hazards

🚨 Typical Discrepancies to Report

Hydraulic fluid leaks
Cracked or damaged structural components
Loose or missing fasteners/pins
Tire damage or low pressure
Brake wear or leaks
Corrosion or excessive wear

✅ Summary

A thorough inspection of the left main landing gear on the Boeing 737 ensures:

Safe taxi, takeoff, and landing operations
Early detection of wear and damage
Compliance with aviation safety standards

Boeing 737 Exterior Inspection — Left Fuselage Section (Step-by-Step Guide)

The left fuselage inspection of a Boeing 737 is a key part of the exterior walk around. This section focuses on the aircraft’s structural skin, doors, windows, and critical sensors that ensure safe pressurization, aerodynamics, and overall integrity.