MD Helicopters 369-500, Инструкция по техническому обслуживанию

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CSP-HMI-3
MD Helicopters, Inc
.
MAINTENANCE MANUAL
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96-40-00
Page 201
Revision 11
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Neither this document nor any part hereof may be reproduced or transferred to
other documents or used or disclosed to others for manufacturing or any other
purpose except as specifically authorized in writing by MD Helicopters, Inc.
Copyright
©
1999 − 2016 by MD Helicopters, Inc.
LIGHTING SYSTEM
MAINTENANCE PRACTICES
1. Description and Operation
(Ref. Figure 201) The lighting system includes
all exterior and interior lights furnished as
standard equipment on the helicopter. The
exterior lights consist of a landing light, left
and right position lights (on forward tips of
skids - green right and red left), lower
anticollision light, upper anticollision light (aft
end of upper vertical stabilizer) and tail
position light (center, aft side of horizontal
stabilizer). Interior lights consist of pilot's
utility light, passenger/cargo compartment
utility light (on the convenience panel) and
instrument panel lighting. All lights are
electrically powered from the 28 Vdc main bus
and protected by individual circuit breakers on
the instrument panel. The anticollision lights
are gas-fired, strobe-type beacon lights.
2. Lighting System Fault Isolation
(Ref. Table 201, Figure 202 and Figure 203)
Do not energize landing light for
more than one minute since this
causes overheating and lamp life is short­
ened. If possible, use an auxiliary power
source when power-on troubleshooting to
avoid excessive current drain from battery.
Table 201. Troubleshooting Night Lighting System
Symptom Probable Trouble Corrective Action
Landing light inoperative.
Defective lamp or loose
connections.
Replace lamp or tighten connections.
Defective landing light relay or
loose connections.
Replace relay or repair connections.
Defective pilot’s collective pitch
stick landing light switch, or cold
solder connection.
Replace switch, or remove switch
and re − solder connection.
Defective landing light circuit
breaker.
Replace circuit breaker.
All position lights inoperative. Defective position light circuit
breaker.
Replace circuit breaker.
Individual position lights. Lamp or wiring defective. Replace lamp or repair wiring.
Taillight inoperative (skid position
lights operative and taillight lamp
not defective).
Disconnected or defective taillight
wire pin connector in horizontal
stabilizer.
Connect or replace pin connector.
Strobe anticollision lights
inoperative.
Helicopter 28 Vdc power is not
supplied to strobe power supply
unit.
Check for defective switch − type
circuit breaker; replace if required.
Check input splices at strobe power
supply unit; repair if required.
WARNING: If an attempt is made to check operating voltage, do so at wire splices without disconnecting
splices. Use caution when working with high voltages.
Defective wiring. Perform continuity check. See wiring
diagram.
CAUTION