FWD  (REF) MAIN GEARBOX  MAIN GEARBOX DETECTOR MAGNETIC CHIP 
B 
Magnetic Chip Detector Inspection Figure 601 (Sheet 1) 

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SEE C
MAIN OIL TANK
GEARBOX MASTER MAGNETIC
(REF) CHIP DETECTOR ENGINE OIL TANK
FWD
C
Magnetic Chip Detector Inspection Figure 601 (Sheet 2)
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////

BUILD DEBRIS

CHIPS

Magnetic Chip Detector Inspection
Figure 601 (Sheet 3)

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(2)  
Access Panels
 415 Left Thrust Reverser Half - Engine 1
 416 Right Thrust Reverser Half - Engine 1
 425 Left Thrust Reverser Half - Engine 2
 426 Right Thrust Reverser Half - Engine 2
 435 Left Thrust Reverser Half - Engine 3
 436 Right Thrust Reverser Half - Engine 3
 445 Left Thrust Reverser Half - Engine 4
 446 Right Thrust Reverser Half - Engine 4

 D.
Prepare to Do the Inspection

 S 016-002-N00
 (1)  Open the fan cowl panels (AMM 71-11-04/201).
 S 046-003-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 INJURY TO YOU OR DAMAGE TO EQUIPMENT.
 (2)  
Do this procedure: Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).

 S 016-004-N00

 (3)  
Open the core cowl panels (AMM 71-11-06/201).

 S 016-005-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00 WHEN YOU OPEN THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (4)  
Open the thrust reversers (AMM 78-31-00/201).

 E.
Do the Inspection of the Magnetic Chip Detectors

 S 026-006-N00
 (1)  Remove the magnetic chip detector (MCD) probe from the valve (AMM 79-21-10/401).
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 966-007-N00
 (2)  If you remove the MCD probe and oil leaks from the housing, replace the housing packing (AMM 79-21-10/401).
 NOTE: If the housing continues to leak with the new housing
____
 packing, replace the housing.

 S 216-008-N00
 (3)  
Use the Visual Inspection Task of the MCD in this section to examine the MCD probe for contamination.

 S 116-009-N00

 (4)  
Before you install the MCD probe, clean the MCD probe with the solvent.

 (a)  
Make the MCD probe dry with a clean cloth.

 (b)  
Make sure you remove all contamination.

 S 726-011-N00
 (5)  
Before you install the MCD probe, do the functional inspection which is in the procedure below.

 F.
　
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