Piper Aircraft Corporation Malibu Mirage PA-46-350P, Airplane Maintenance Manual

Page: 861 / 1956

PAGE 1
Feb 28/07 4G11
33-10-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
FLIGHT COMPARTMENT
All lighting is 24 Vdc except for the circuit breaker panels, which are lit by electroluminescent means and
use an inverter to convert 24 Vdc input from the 5 amp INSTR PANEL circuit breaker, to 115 Vac 400 Hz.
Cockpit lighting consists of instrument panel post lights which are controlled by a solid state dimmer
control unit. Radio lighting is controlled separately and in any case consists of integral lighting normally
provided in radio equipment. Switches are back lighted for positive identification and visibility. An
overhead light is located in the cockpit ceiling above each of the two front seats providing map lights and
standby panel lighting for each crew member. These standby/ map lights are controlled by an ON-OFF,
dimmer rheostat, located on the overhead, between the two lights. The electroluminescent lighting
receives its power from the PANEL LIGHTS circuit breaker via the panel lights dimmer switch, taper
block TB1 and the electroluminescent panel inverter.
The three dimmer control units are solid state and powered through the 3 amp ANNUN and AVIONICS
DIMMING, and the 5 amp INSTR PANEL circuit breakers. The dimmer controls rheostats control the
dimmer outputs for post lights, circuit beaker panels, switch, and avionics lighting intensity.
All panel lights, except for integral radio equipment lighting, are controlled from the dimmer control unit
and dimming rheostat. Employ conventional troubleshooting methods: panel lights full bright, first
replacing offending individual lamps. If not successful measure socket voltage and repair as required. If
all lamps are “OUT” check power from bus, through circuit breaker, harness, dimmer control, and dimmer
output. Replace or repair as required.
NOTE: Refer to 91-33-10, 91-33-20, and 91-33-40 for schematics on the Lighting systems.
1. Dimmer Control Unit
A. Removal
(1) The dimmer control units are mounted on the aft right side of the forward pressure bulkhead.
Access is gained from beneath the copilot’s instrument panel. The rheostat controls are
mounted on the lower left side of the pilot’s instrument panel just below the main electrical
switch panel.
(2) Disconnect the electric harness connector.
(3) Remove mounting screws and the dimmer control assembly.
B. Installation
(1) Position the dimmer control assembly in place and secure with the mounting screws.
(2) Connect the electrical harness connector to dimmer assembly.
(3) Cycle lighting to verify function.
2. Post Lights
A. Removal
(1) Disconnect wire from rear of socket behind panel.
(2) Unscrew rear contact collar from rear of socket.
(3) Remove mounting washer and nut from light assembly.
(4) Pull assembly from panel mounting hole.
B. Installation
(1) Insert assembly into panel mounting hole.
(2) Install mounting washer and nut onto light assembly.
(3) Screw rear contact collar from rear of socket.
(4) Connect wire to rear of socket behind panel.