747-400 AMM 飞机维护手册 点火 IGNITION(26)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(c)  Hold the igniter plug boss (2) with the crowfoot wrench and install the igniter plug (4). 1) Tighten the igniter plug (4) to 300-360 pound-inches
 (33.9-40.7 newton-meters).
 G. Return the Aircraft to Its Usual Condition
 S 424-046-N00
 (1)  Install the exciter-to-igniter plug cables (5) which were removed (AMM 74-21-01/401).
 S 414-048-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU CLOSE THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (2)  
Close the right thrust reverser (AMM 78-31-00/201).

 S 414-052-N00

 (3)  
Close the right core cowl panel (AMM 71-11-06/201).

 S 414-053-N00

 (4)  
Close the right fan cowl panel (AMM 71-11-04/201).

 S 444-047-N00

 (5)  
Do the activation procedure for the thrust reverser
 (AMM 78-31-00/201).

 S 714-049-N00

 (6)  
Do the operational (audible) test of the ignition system
 (AMM 74-00-00/501).

 

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 74-21-02
 ALL  ú ú N01 Page 408 ú Oct 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
IGNITER PLUG - INSPECTION/CHECK
_______________________________
 1.  General
_______
 A.  This procedure gives the data for the tasks that follow:
 (1)  
Visual inspection of the igniter plug.

 (2)  
Immersion depth check of the igniter plug.

 B.  Each engine has two equal igniter plugs in the diffuser and combustor case.
 (1)  
You will find one of the igniter plugs at the 4 o'clock position.

 (a) This igniter plug is part of the ignition system 1.

 (2)  
You will find the other igniter plug at the 5 o'clock position.

 (a) This igniter plug is part of the ignition system 2.
 C.  Use the visual inspection when you examine the igniter plugs for worn areas and for damage.
 (1) This will tell you if you must replace the igniter plug.
 D.  Use the immersion depth check to find the thickness of the spacer and igniter boss.
 (1)  You can also use this procedure when the engine does not start satisfactorily.
 E.  We recommend that you clean the igniter plugs before you do the inspection.
 TASK 74-21-02-206-001-N00
 2.  Visual Inspection of the Igniter Plug
_____________________________________
 A.  Standard Tools and Equipment
 (1)  
Die - Thread Chasing, 1.000-20NS

 (2)  
Die - Thread Chasing, 0.9375-16NS

 (3)  
Tool - Service Wear Measuring, CT-468 or CT-492

 NOTE: This tool works on the ignitor plugs made by the Champion
____ Spark Plug Company or the Auburn Company.
 Champion Spark Plug Company 900 Upton Toledo, Ohio 43601
 (4)  Magnifying Glass - Lighted
 B.  References
 (1)  AMM 71-00-02/401, Power Plant
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 ALL  ú ú N01 Page 601 ú Jun 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE  A 
1  UPPER SHELL  CONTACT BUTTON  HOLE TERMINAL (WELL) 
SEE  C  D 
INSULATOR SUPPORT FLANGE  CERAMIC INSULATOR SEE B  LOWER SHELL  SHELL THREAD IGNITER PLUG WEAR A  CERAMIC INSULATOR  COUPLING THREAD 
2 
4  3 
ERODED AREA  Igniter Plug Inspection Figure 601 (Sheet 1) B IGNITER PLUG EROSION L-A3660 

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