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 B.  The components that make up ignition system number 1 of an engine are found above the components that make up ignition system number 2 of an engine.
 C.  You can hear a click caused by the operation of ignition system number 1 or ignition system number 2 of an engine.
PLUG CABLE TO-IGNITER TOP EXCITER- EXCITER IGNITION 
SEE  A  PLUG IGNITER 
(REF) PUMP HYDRAULIC 
PLUG CABLE LOWER EXCITER-TO-IGNITER  A  FWD
Figure 501 (Sheet 1) Ignition System Audible Test 

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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE  F 
+21cTAT  D-T0 1  +23c  CABIN ALTITUDE 
1.83  1.83  REV  1.83  AUTOTHROT DISC 
OUTFLOW VLV L 
1.62  1.62  1.00  1.65 

(11 LINES) SEE D
SEE C
EPR
CON IGNITION ON STBY IGNITION ON
RECALL PG 1
75.6 75.6 15.2 83.7
FL 250 246-324 KTS
DOWN
NTAI 1
GEAR
587 587 97 623
F 5
L EGT
A P S
12 DUCT PRESS 12 SEE B CAB ALT 7500 RATE+250 TOTAL FUEL345.0 SEE E LDG ALT 200A ~P 5.6 TEMP +10c
MAIN EICAS DISPLAY
B
NACELLE ANTI-ICE
ENGINE START SWITCH  AUTO IGNITION SWITCH (4 LOCATIONS)
(4 LOCATIONS)  CONTROL SELECTOR
NACELLE ANTI-ICE 12 34
23
WWWW
1
4 ON ON
ww STANDBY
ON VALVE VALVE ONSTBY IGNITION AUTO
w aa w
IGNITION
VALVE
VALVE 1
SELECTOR NORM  CON BOTH
1 2 a
a ON 2
ON
w
VALVE
a
WING ANTI-ICE
CONTINUOUS IGNITION SWITCH
ENGINE IGNITION CONTROL MODULE  ANTI-ICE MODULE
C D
FUEL CONTROL SWITCH
E
(4 LOCATIONS)
Ignition System Audible Test Figure 501 (Sheet 2)
H04130
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.

EEC PANEL ASSEMBLY, M7330

Ignition System Audible Test
Figure 501 (Sheet 3)

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H04132
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
TASK 74-00-00-705-015-N00
 2. System (Audible) Test - Ignition System (Fig. 501)
_______________________________________
 A. References
 (1)
AMM 23-41-00/501, Service Interphone System

 (2)
AMM 24-22-00/201, Manual Control

 (3)
AMM 27-51-00/201, Trailing Edge Flap System

 (4)
AMM 30-21-00/501, Engine Inlet Thermal Anti-Ice System

 (5)
AMM 31-61-00/501, Integrated Display System

 (6)
AMM 36-00-00/201, Pneumatic System

 (7)
AMM 71-00-00/201, Power Plant

 (8)
AMM 71-11-04/201, Fan Cowl Panel

 (9)
AMM 71-11-06/201, Core Cowl Panel

 (10)
 AMM 78-31-00/201, Thrust Reverser System

 (11)
 AIPC 74-21-01 Fig. 5, AIPC 74-21-02 Fig. 5

 (12)
 WDM 74-31-11, 74-31-12, 74-31-13, 74-31-14, 74-31-21, 74-31-22, WDM 74-31-23, 74-31-24, 74-31-31, 74-31-32, 74-31-33, 74-31-34, WDM 74-31-41, 74-31-42, 74-31-43, 74-31-44, 76-11-11, 76-11-21

 (13)
 SSM 74-31-01, 74-31-02, 74-31-03, 74-31-04

 B. Access
 (1)  
Location Zone
 117 Electrical & Electronics Compartment, L
 221 Control Cabin, LH
 222 Control Cabin, RH
 412 Engine 1 - Aft HPC to Diffuser Case
　
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