S 016-120-N00

 (2)  
Open the fan cowl panels (AMM 71-11-04/201).

 S 046-121-N00
 WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______ OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
 (3)  
Do this procedure: Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).

 (4)  
Open the core cowl panels (AMM 71-11-06/201).

 S 016-122-N00
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No. 12 - Prepare for the Borescope Inspection
_____________________________________________
 S 016-123-N00 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU OPEN THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (5) Open the thrust reversers (AMM 78-31-00/201).
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
ACCESS PORT  FROM REAR CLOCKWISE POSITION ANGULAR  PART(S) IN VIEW FOR INSPECTION  INCH (mm) PROBE DIAMETER RECOMMENDED MAX  NOTES 
THRU FAN  ALL  LPC COMPRESSOR INLET  1ST C-BLADE 1ST C-VANE 
AP-1  245`  FRONT OF 4TH C-VANE REAR OF 4TH C-BLADE  ----- 1 
AP-2  233`  REAR OF 5TH C-BLADE FRONT OF 6TH C-BLADE  0.270 (6.8) 
AP-3  231`  FRONT OF 7TH C-BLADE REAR OF 6TH C-BLADE  0.270 (6.8) 
AP-4  127`  FRONT OF 9TH C-BLADE REAR OF 8TH C-BLADE  0.270 (6.8) 
AP-5  214`  FRONT OF 11TH C-BLADE REAR OF 10TH C-BLADE  0.270 (6.8) 
AP-6  98`  FRONT OF 13TH C-BLADE REAR OF 12TH C-BLADE  0.270 (6.8) 
AP-7  80`  FRONT OF 15TH C-BLADE REAR OF 14TH C-BLADE  0.270 (6.8) 
AP-8  277`  CHAMBER, 1ST TURBINE VANE FUEL NOZZLE, COMBUSTION  0.444 (11.3) 
AP-8  225` 45`,128`,  CHAMBER, 1ST TURBINE VANE FUEL NOZZLE, COMBUSTION  0.444 (11.3) 
AP-8  172`  FUEL NOZZLE, COMBUSTION CHAMBER, 1ST TURBINE VANE  0.444 (11.3)  2 
AP-8  338`  FUEL NOZZLE, COMBUSTION CHAMBER, 1ST TURBINE VANE  0.444 (11.3)  3 
AP-9  93`  FRONT OF 1ST T-BLADE FRONT OF 1ST T-VANE  0.270 (6.8) 
AP-10  139`  REAR OF 2ND T-BLADE FRONT OF 3RD T-VANE  0.270 (6.8) 
AP-11  215`  FRONT OF 2ND T-BLADE REAR OF 1ST T-BLADE  0.444 (11.3)  4 
CASE STRUTS THRU EXHAUST  ALL  6TH T-VANE 6TH T-BLADE 

ACCESS IS THROUGH FOURTEEN 2.5 BLEED VALVE OPENINGS
IN FAN EXIT CASE LINER. A FLEXIBLE PROBE IS NECESSARY AT THIS ACCESS PORT.
RIGHT ANGLE EYEPIECE IS NECESSARY.
RIGHT ANGLE EYEPIECE IS RECOMMENDED.
OPTIONAL BORESCOPE PORT LOCATION.

Borescope Access Port Data
Figure 608 (Sheet 1)

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AP-1 
(14 LOCATIONS)  AP-8 
AP-8  (338`) 
(277`) 

FAN THRU  AP-2 AP-3  AP-5  (225`) AP-8  AP-11 (215`)  L-A3032  EXHAUST THRU 
____NOTE:  SHOWN FOR CLARITY. QEC EQUIPMENT NOT 
(LEFT SIDE) BORESCOPE ACCESS PORT LOCATIONS 

Borescope Access Port Data
Figure 608 (Sheet 2)

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