(2)  
Access Panel
 416 Right Thrust Reverser Half - Engine 1
 426 Right Thrust Reverser Half - Engine 2
 436 Right Thrust Reverser Half - Engine 3
 446 Right Thrust Reverser Half - Engine 4

 D.  Procedure
 S 026-002-N00
 (1)  
Remove the ignition exciter (AMM 74-11-01/401).

 S 216-003-N00

 (2)  
Visually examine the ignition exciter for dirt and damage in these areas:

 (a)
Dirt or unwanted items in the contact well area.

 1)  If they are found, clean the contact well area (AMM 74-11-01/701).

 (b)  
Damaged pins or pins that were bent in the electrical connector. 1) If the pins were bent, make them straight with a needlenose

 pliers.
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE  A 
UPPER 
IGNITION 
EXCITER 
SEE  B 
LOWER 
FWD  IGNITION 
EXCITER-TO-IGNITER  EXCITER 
PLUG CABLE 
SEE  B 
A 
IGNITION 
EXCITER 
OUTPUT 
RECEPTACLE 
A 
A  INPUT 
ELECTRICAL 
CONNECTOR 
ARCING ON CONTACT  NO ARCING ON CONTACT 
B  BUTTON  BUTTON 
A-A 
Ignition Exciter Inspection
Figure 601 

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2)  If the pins are damaged, replace the ignition exciter (AMM 74-11-01/401).
 (c)  Damage or signs of arcing or flashover on the output receptacle well.
 NOTE: Signs of arcing are pitting or discoloration on the
____ contact button. A sign of flashover is carbon tracking.
 1) If you see much pitting, discoloration, or carbon tracking, replace the ignition exciter (AMM 74-11-01/401). 2) Remove small quantities of discoloration, pitting, and carbon tracking (AMM 74-11-01/701).
 CAUTION:_______BE CAREFUL WHEN YOU REPAIR THE THREADS. THE REPAIRS CAN MAKE BURRS WHICH CAN CAUSE DAMAGE TO THE THREADS.
 (d)  
Damage on the threads of the electrical connector and output receptacle. 1) For small quantities of damage, repair the threads of the

 electrical connector or output receptacle with a thread die. 2) If a thread die cannot repair the damage, replace the ignition exciter (AMM 74-11-01/401).

 (e)  
Cracks, dents, or abrasions on or in the ignition exciter case.

 1)  If cracks, dents, or abrasions are found, replace the ignition exciter (AMM 74-11-01/401).
 S 426-004-N00
 (3)  Install the ignition exciter (AMM 74-11-01/401).
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IGNITION EXCITER - CLEANING/PAINTING
____________________________________
 1. General
_______
 A. This procedure gives the steps to clean the ignition exciter.
 B. There are two ignition exciters on each engine.
 TASK 74-11-01-107-001-N00
 2. Clean the Ignition Exciter
__________________________
 A. Standard Tools and Equipment
 (1)  
Air Source - Compressed, Clean, Filtered, Dry - 30 psi (200 kPa) maximum

 (2)  
Felt Bob - Circular, for use with hand chuck - 0.5 inch (13 mm) diameter, 1.75 inches (44.5 mm) long

 (3)  
Brush - Long Bristle, Nonmetallic
　
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