S 712-004-N00
 (4)  Make sure the N1 rotor turns freely.
 (a)  Set the mats so that they are above the lower half of the inlet cowl.
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
WARNING: WEAR HEAVY GLOVES ON HANDS WHEN THE FAN IS TURNED BY HAND.
_______
 THE FAILURE TO WEAR GLOVES CAN CAUSE INJURY TO PERSONS.

 (b)  
With heavy gloves on your hands, manually turn the fan in the normal direction of turn (counterclockwise as seen from the front). Make sure that the fan turns freely and that no damage is seen.

 (c)  
Remove the mats from the inlet cowl.

 S 012-072-N00
 (5)  Open the fan cowl panels (AMM 71-11-04/201).
 S 042-074-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.
 (6)  
Do this procedure: Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).

 S 012-073-N00

 (7)  
Open the core cowl panels (AMM 71-11-06/201).

 S 012-075-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.
 (8)  
Open the thrust reversers (AMM 78-31-00/201).

 S 982-006-N00

 (9)  
Manually turn the N2 rotor (AMM 72-00-00/201).

 (a)  Make sure the rotor turns freely with no signs of damage.
 S 212-007-N00
 (10) Visually make sure the engine inlet, the turbine exhaust, and the
 2.9 bleed valves are not damaged.
 S 212-073-N00
 (11)
 Make sure that the engine inlet, turbine exhaust, and the 2.9 bleed valves do not contain metal particles.

 S 212-070-N00

 (12)
 Do a check of the main oil filter for contamination.

 (a)  
Remove the element from the main oil filter (AMM 79-21-05/401).

 (b)  
Examine the element for contamination.

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(c)  If there is contamination which shows an engine failure, do not ferry the engine with the engine free to turn.
 S 212-071-N00
 (13) Do a check of the magnetic chip detector for contamination.
 (a)  Make sure the probes on the magnetic chip detector for the No. 1, 1.5, 2, 3, and 4 engine bearings are free of contamination (AMM 79-21-10/601).
 S 042-013-N00
 (14) Disconnect the engine start valve.
 (a)
Open this circuit breaker and install the DO-NOT-CLOSE tag:

 1)  P6 Main Power Distribution Panel
 a) 6J18 ENG START AIR CONT

 (b)  
Disconnect the electrical connector, DV351, from the start valve.

 (c)  
Put a cap on the open ends of the electrical connector.

 (d)  
Attach the loose electrical plug to an adjacent line or cable.

 (e)  
Remove the DO-NOT-CLOSE tag and close this circuit breaker:

 1)  P6 Main Power Distribution Panel
 a) 6J18 ENG START AIR CONT

 S 612-010-N00
 (15) Fill the engine oil tank (AMM 12-13-03/301).
 S 412-076-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.
 (16)
 Close the thrust reversers (AMM 78-31-00/201).

 (17)
 Close the core cowl panels (AMM 71-11-06/201).

 S 412-078-N00
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