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 (b)  Visually examine the external oil system tubes for 0.125 inch
 (3.175 mm) minimum clearance to adjacent tubes or structure.
 1)  Minimum clearance between any two adjacent tubes or between one single tube and any other adjacent engine part shall be
 0.125 inch (3.175 mm) unless otherwise specified. Exceptions to this clearance requirement are permitted at specified locations where adjacent tubes are clipped together or where other local constraints will prevent tube contact at clearances below 0.125 inch (3.175 mm) minimum.
 2)  Minimum clearance refers only to clearance relative to tube and not to fittings or other attached hardware.
 (c)  Examine the tubes to make sure they are correctly attached at all support locations. 1) Replace all worn clamps.
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
2) Tighten all loose clamp bolts and brackets at all support points along the tube length. 3) Tighten all loose tube fittings.
 (d)  
Examine the oil system tube connections, tube or manifold to component connections, and tube to case boss connections for leaks and loose connections. 1) No leaks or loose connections permitted. 2) Make all corrections as necessary.

 D.
Put the Airplane Back to Its Usual Condition.

 S 416-017-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00 WHEN YOU CLOSE THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (1)  
Close the thrust reversers (AMM 78-31-00/201).

 S 416-014-N00

 (2)  
Close the core cowl panels (AMM 71-11-06/201).

 S 416-015-N00

 (3)  
Close the fan cowl panels (AMM 71-11-04/201).

 S 446-016-N00

 (4)  
Do the activation procedure for the thrust reversers (AMM 78-31-00/201).

 TASK 79-00-00-216-018-N00
 3.  Do the Leak Detection Inspection of the Oil System__________________________________________________
 A. Consumable Materials
 (1)  
G01510 Dye - Oil Red HF Liquid - OPD5814.

 B.
References

 (1)  
AMM 12-13-03/301, Engine Oil Servicing

 (2)  
AMM 70-42-03/201, Degreasing of the Engine Externals

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(3)  
AMM 71-00-00/201, Power Plant

 (4)  
FIM 71-08-00/101 Power Plant, Engine Check

 (5)  
AMM 71-11-04/201, Fan Cowl Panels

 (6)  
AMM 71-11-06/201, Core Cowl Panels

 (7)  
AMM 78-31-00/201, Thrust Reverser System

 (8)  
AMM 79-21-05/401, Main Oil Filter

 (9)  
AMM 79-21-10/401, Magnetic Chip Detectors

 C.
Access

 (1)  
Location Zones
 412 Engine 1
 422 Engine 2
 432 Engine 3
 442 Engine 4

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

 D.
Prepare to Do the Inspection of the Oil System

 S 016-019-N00
 (1)  Open the fan cowl panels (AMM 71-11-04/201).
 S 046-020-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.
 (2)  
Do this procedure: Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).

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

 S 016-021-N00
　
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