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WAKE HAZARD AREA FOR GROUND IDLE (REF 71-09-100 MP) OF APPLICABLE
ENGINE DURING IGNITION SYSTEM CHECK.
IGNITION VOLTAGE IS DEADLY. DO NOT TOUCH IGNITER PLUGS OR LIVE PORTION OF IGNITION EXCITER OR LEADS DURING OPERATION.
CAUTION:  PRIOR TO PERFORMING IGNITION SYSTEM CHECK, DRY MOTOR ENGINE TO REMOVE UNBURNED FUEL, (REF 71-09-100 MP) UNBURNED FUEL COULD RESULT IN ENGINE INTERNAL OR EXHAUST FIRE. DO NOT PERFORM IGNITION SYSTEM CHECK IF N2 IS ROTATING. WITH N2 ROTATION, FUEL ENTRY INTO COMBUSTION CHAMBER IS POSSIBLE WHEN START LEVER IS ADVANCED TO IDLE AND INADVERTENT LIGHTUP DURING IGNITION SYSTEM CHECK COULD RESULT.
A.  Provide ac and dc power. Close the engine bleed valve for the engine to be tested.
B.  On airplanes with four position engine start switch, close START IGNITION and LOW ENERGY IGNITION circuit breakers for the engine to be tested and ENGINE START VALVES circuit breaker on the P6-2 circuit breaker panel.
C.  Check the high energy 20 joule system, by moving the start lever to the IDLE position and moving the associated start switch to the GRD position. (The start switch is held in the GRD position by a solenoid). With an individual stationed at inlet of engine to be tested, audibly check that both igniters operate (an omni-directional sound indicates both ingiters are operating, a directional sound, i.e., LEFT side only, indicates igniter in #7 can not operating, consequently, a sound emanating from RIGHT side only indicates igniter in #4 can is not operating). Open the ENGINE START VALVES circuit breaker and the start switch shall return to the OFF position automatically. Move the start switch to the FLT position. Verify operation of both igniters.
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Oct 20/93 74-00 Page 501
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

F.  On airplanes with five position engine start switch, close RIGHT IGNITION, LEFT IGNITION and ENGINE START VALVES circuit breakers located on the P6-2 circuit breaker panel.
G.  Move the start switch for each engine to the GRD position with start lever at IDLE. Verify operation of both igniters. (The start switch is held in the GRD position by a solenoid). Open ENGINE START VALVES circuit breaker and the start switch shall return to the OFF position automatically.
H.  Check right and left igniters on each engine by moving the start lever to IDLE then move the start switch to L IGN (verify operation of #2 igniter in #7 can on left side of engine) move the start switch to R IGN (verify operation of #1 igniter in #4 can on right side of engine).
I.  Move the start switch for each engine to FLT, with the start lever at IDLE. Verify operation of both igniters.
J.  Return the system to normal OFF condition.

K89440
Engine Combustion Chamber Numbering (Burner Can)  504 
74-00  Figure 501  Jun 20/85 
Page 502 

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D.  Check the low energy 4 joule ignition system by moving the start switch to the LOW IGN position and the associated start lever to the IDLE position. Verify operation of one igniter.
E.  Return all switches and levers to the OFF position.
F.  On airplanes with five position engine start switch, close RIGHT IGNITION, LEFT IGNITION and ENGINE START VALVES circuit breakers located on the P6-2 circuit breaker panel.
G.  Move the start switch for each engine to the GRD position with start lever at IDLE. Verify operation of both igniters. (The start switch is held in the GRD position by a solenoid). Open ENGINE START VALVES circuit breaker and the start switch shall return to the OFF position automatically.
H.  Check right and left igniters on each engine by moving the start lever to IDLE then move the start switch to L IGN (verify operation of #2 igniter in #7 can on left side of engine) move the start switch to R IGN (verify operation of #1 igniter in #4 can on right side of engine).
I.  Move the start switch for each engine to FLT, with the start lever at IDLE. Verify operation of both igniters.
J.  Return the system to normal OFF condition.
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Jun 20/86 74-00 Page 503
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IGNITION SYSTEM - INSPECTION/CHECK

1.  General
　
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