Electrical System Piper Archer III PA-28-181 step by step,

WELCOME ADVANCE FLYING ACADEMY

ELECTRICAL SYSTEM

The 28-volt electrical system includes a 24-volt battery for starting and to back up alternator output. Electrical power is supplied by a 70 ampere alternator.The battery is mounted in a box on the battery shelf located in the aft fuselage A voltage regulator with integral overvoltage relay is located on the forward left side of the fuselage behind the instrument panel.

All powerplant and exterior lighting switches are grouped in a overhead switch panel, with all avionics switches grouped in a switch panel just above the throttle quadrant. The circuit breaker panel is located on the lower right side of the instrument panel Each breaker is clearly marked to show which circuit it protects. Also, circuit provisions are made to handle the addition of communications and navigational equipment. Standard electrical accessories include the starter, the electric fuel pump, electric engine primer, the stall warning horn, the ammeter, and the annunciator panel.

The annunciator panel includes, alternator inop, oil pressure, vacuum inop., low bus voltage, start engage, pitot heat and provisions for optional air conditioner door open. The annunciator panel lights are provided only as a warning to the pilot that a system may not be operating properly, and that the applicable system gauge should be checked and monitored to determine when or if any corrective action is required. Standard electrical accessories include the navigation lights, anti collision strobe lights, landing/taxi lights, instrument panel lighting and cabin dome light.

Two lights, mounted in the overhead panel, provide instrument and cockpit lighting for night flying. The lights are controlled by rheostat switches located in the overhead panel. A map light window in each lens is actuated by an adjacent switch. A wing tip landing/taxi light system consists of 2 lights (one in each wing tip) and is operated by a rocker type switch mounted on the overhead switch panel. (Wing tip lights also used as recognition lights.)

The digital ammeter in the alternator system displays in amperes the load placed on the alternator. It does not indicate battery discharge. With all electrical equipment off (except the master switch) the ammeter will be indicating the amount of charging current demanded by the battery. As each item of electrical equipment is turned on, the current will increase to a total appearing on the ammeter. This total includes the battery. The average continuous load for night flight, with radios on, is about 32 amperes. This 32 ampere value, plus approximately 2 amperes for a fully charged battery, will appear continuously under these flight conditions.

👉 PIPER ARCHER III PA 28-181 HANDBOOK

👉 PREFLIGHT INSPECTION

👉 MISCELLANEOUS

👉 BEFORE STARTING ENGINE

👉 NORMAL START - COLD ENGINE

👉 NORMAL START - HOT ENGINE

👉 ENGINE START WHEN FLOODED

👉 STARTING WITH EXTERNAL POWER

👉 WARM-UP

👉 TAXIING

👉 GROUND CHECK

👉 BEFORE TAKEOFF