-
the start lever ignition limit switch
-
the engine igniter selector switch
-
the engine start switch.
B. The test applies to each engines. Make sure you do the test in the sequence provided in the procedure.
TASK 74-00-00-755-010-C00
2. Audible Test of the Ignition System
___________________________________
A. References
(1)
AMM 24-22-00/201, Electrical Power-Control
(2)
AMM 71-00-00/201, Power Plant
B. Access
(1)
Location Zones
410 No. 1 Power Plant (Left)
420 No. 2 Power Plant (Right)
(2)
Access Panels
5737L Engine No. 1 - Right Fan Cowl Panel
5738L Engine No. 1 - Left Thrust Reverser
5739L Engine No. 1 - Right Thrust Reverser
5746L Engine No. 1 - Left Fan Cowl Panel
5837R Engine No. 2 - Right Fan Cowl Panel
5838R Engine No. 2 - Left Thrust Reverser
5839R Engine No. 2 - Right Thrust Reverser
C. Prepare to Do the Audible Test
S 865-011-C00
(1) Supply the electrical power (AMM 24-22-00/201).
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S 865-012-C00
WARNING:_______ DO NOT DO A CHECK OF THE IGNITION SYSTEM WHEN YOU HAVE ONE OF
THE CONDITIONS THAT FOLLOW:
- THE AIRPLANE IS IN THE HANGER,
- THE AIRPLANE IS NEAR BUILDINGS OR OTHER AIRPLANES THAT
ARE WITHIN THE DANGEROUS JET-WAKE AREA FOR THE GROUND IDLE
(AMM 71-00-00/201),
- DURING AIRPLANE FUELING.
MAKE SURE THAT NO PERSONS OR EQUIPMENT ARE IN THE DANGEROUS
JET-WAKE AREA FOR THE GROUND IDLE (AMM 71-00-00/201) OF THE
APPLICABLE ENGINE.
IGNITION VOLTAGE IS VERY DANGEROUS. DO NOT TOUCH THE IGNITER
PLUGS, THE ENERGIZED PART OF THE IGNITION EXCITER OR THE LEADS
DURING THE OPERATION.
WARNING:_______ USE THE PROCEDURE IN CHAPTER 71 TO OPERATE THE POWER PLANT
(AMM 71-00-00/201). IF YOU DO NOT USE THIS PROCEDURE, YOU CAN
CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
CAUTION:_______ BEFORE YOU CAN TEST THE IGNITION SYSTEM, DRY MOTOR THE ENGINE
TO REMOVE ALL FUEL IN THE ENGINE GAS PATH (AMM 71-00-00/201).
FUEL THAT HAS NOT BURNED CAN CAUSE AN INTERNAL ENGINE FIRE OR A
TURBINE EXHAUST AREA FIRE.
MAKE SURE N2 DOES NOT TURN WHEN YOU DO THE TEST OF THE IGNITION
SYSTEM. IF N2 TURNS, FUEL CAN GO INTO THE COMBUSTION CHAMBER
WHEN THE START LEVER IS IN THE IDLE POSITION. AN ACCIDENTAL
ENGINE LIGHTUP CAN OCCUR.
(2)
Do the procedure to dry motor the engine to remove the remaining fuel from the gas path (AMM 71-00-00/201).
S 865-013-C00
(3)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a) P6 Load Control Center 1) ENG 1 START VALVE
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2) ENG 2 START VALVE
S 865-014-C00
(4) Make sure that the FUEL VALVE CLOSED (engine fuel shutoff valve) indicator light on the overhead fuel control panel P5 is dim.
NOTE: The position light for the shutoff valve for the engine
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