ICA-D212-725 (96)
Page 59 of 90
CHAPTER 96 – ELECTRICAL SYSTEM (96-00-00)
COPYRIGHT
2007 BY DART AEROSPACE LTD.
THIS DOCUMENT IS PRIVATE AND CONFIDENTIAL AND IS SUPPLIED ON THE EXPRESS CONDITION THAT IT IS NOT TO BE USED FOR ANY PURPOSE OR COPIED OR COMMUNICATED TO ANY
OTHER PERSON WITHOUT WRITTEN PERMISSION FROM DART AEROSPACE LTD.
Revision:
4
Date: 11.06.01
96.6.31.1.7
Energize tachometer generator on
test set.
96.6.31.1.8 Verify
power turbine tachometer
pointers on pilot and copilot dual tachometers read
upscale and indicate speed at which test set
tachometer generator is turning.
96.6.31.1.9 Disconnect
connector (P111) from
test set and reconnect to engine power turbine
tachometer generator.
96.6.31.1.10 Remove electrical power from
helicopter.
96.6.32
DC Gas Producer Tachometer
Indicator
NOTE
S/Ns 30576, 30687, 30931, 30817
and 30599 use an AC Gas
Producer Tachometer indicating
system. See section 96.5 for
details. For all S/Ns except
30576, 30687, 30931, 30817 and
30599 refer to this section for
details of the DC Gas Producer
Tachometer indicating system.
96.6.32.1
The DC gas producer tachometer
indicator system consists of the engine gas
producer tachometer generator and gas producer
tachometer indicator. The gas producer
tachometer generator on the engine sends a
frequency signal to the engine gas producer
tachometer indicator proportional to engine gas
producer speed. Gas producer speed is given on
percent of rpm. The DC gas producer tachometer
indicator uses DC power to display a digital
readout of rpm and store any exceedances.
96.6.33
Operational Check – DC Gas
Producer Tachometer Indicator
SPECIAL TEST EQUIPMENT
TYPE OR MODEL
NOMENCLATURE
Howell H337
Engine test set
or Equivalent
96.6.33.1 Perform
operational check as
follows:
96.6.33.1.1 Apply electrical power to
helicopter electrical system.
96.6.33.1.2 Disconnect
connector (P89) from
engine gas producer tachometer generator and
connect to matching receptacle on test set.
96.6.33.1.3
Energize tachometer generator on
test set.
96.6.33.1.4 Verify engine gas producer
tachometer pointers on pilot and copilot dual
tachometers read upscale and indicate speed at
which test set tachometer generator is turning.
96.6.33.1.5 Disconnect
connector (P89) from
test set and reconnect to engine gas producer
tachometer generator.
96.6.33.1.10 Remove electrical power from
helicopter.
96.7
INTERIOR LIGHTING SYSTEM
96.7.1
Interior Lighting Systems
The interior lighting systems include cockpit lights,
dome lights, pilot instrument lights, copilot
instrument lights, engine instrument lights,
secondary instrument lights, pedestal lights,
overhead console lights, and cargo compartment
lights.
96.7.2 Cockpit
Lights
Cockpit lights are multipurpose utility lights
designed to selectively provide either red or white
illumination, utilizing a narrow spotlight beam or
wide floodlight beam. Controls necessary to
obtain operational modes of ON/OFF,
BRIGHT/DIM, SPOT/FLOOD, and red or white
illumination are incorporated in the lamp body.
96.7.3
Operational Check – Cockpit
Lights
96.7.3.1
Apply electrical power to helicopter
electrical system. Check that pilot cockpit light is
operational in each mode (ON/OFF, DIM/BRIGHT,
and SPOT/FLOOD on both red and white).
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