Lighting Description And Operation; Lighting Troubleshooting; Dimmer Control Assembly Removal; Dimmer Control Assembly Installation - Piper PA-44-180 SEMINOLE Maintenance Manual

GENERAL.
The optional night lighting system renders the aircraft operational at night, thus greatly extending its capability
and possible night time in any given period.
DESCRIPTION AND OPERATION.
External lighting comprises white wing tip strobe lights, recognition lights, navigation lights (with two tail
lights) and a landing,, taxi light located in the nose cone. Internal lighting will comprise instrument panel
backlighting, dual overhead flood lights and map lights.
TROUBLESHOOTING.
When checking the lighting system, the master switch must be on in order for the lights to operate. Insure that
the circuit breaker which protects the light circuit that is being checked is pushed "IN". If the light still fails to
operate, replace the bulb.
FLIGHT COMPARTMENT.
The optional lighting comprises instrument panel backlighting with a dimmer control, dual overhead flood
lights, a compass light and map lights.
INSTRUMENT AND PANEL LIGHTS.
REMOVAL OF DIMMER CONTROL ASSEMBLY.
Access to the dimmer control assembly is from beneath the instrument panel.
1. Master Switch off.
2. Disconnect the electrical connector from the assembly.
3. Remove the two screws securing the assembly to the instrument panel.
4. Remove the assembly from the airplane.
INSTALLATION OF DIMMER CONTROL ASSEMBLY.
1. Master switch off.
2. Position the assembly in the instrument panel with the control knobs inserted into their appropriate slots.
3. Secure the assembly to the instrument panel with the two screws previously removed.
4. Connect the electrical connector to the assembly.
5. Master switch on.
6. Check operation of dimmer control assembly.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
2I8
3 3 - 11 - 0 2
Page 33-01
Revised: May 15, 1989