F. Prepare for the Procedure
S 944-049-N00
(1) Attach a DO-NOT-OPERATE tag to the ENG START switch on the pilot's overhead panel, P5.
S 044-050-N00
WARNING: DO THE 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 the deactivation procedure for the thrust reverser for ground maintenance (AMM 78-31-00/201).
S 014-051-N00
(3) Open the fan cowl panels (AMM 71-11-04/201).
S 014-052-N00
(4) Open the core cowl panels (AMM 71-11-06/201).
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 014-053-N00
WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO 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).
G.
Procedure
S 424-054-N00
(1) Do the steps that follow to install the access covers.
NOTE: Use a No. 10 Torq-set drive to install the screws.
____
CAUTION: MAKE SURE YOU USE THE CORRECT PART NUMBERS BECAUSE
_______ INCORRECT PARTS CAN BE INSTALLED. REFER TO PW SB 72-161 AND PW SB 72-382.
(a)
Install the access covers (6) and the rear cover plate (1) as follows (Fig. 401):
(b)
Install the two access covers (6) to the fan exit fairing (3) with the ten screws (5) and (4), lubricated with Engine Oil.
NOTE: If the engine has PW SB 72-382, do the step that follows
____
when you do this step.
(c) ENGINES POST-PW-SB 72-382; Bond the classified washers to the inside of the Access Covers at bolt holes (5) as follows: 1) Use this procedure for one of the two conditions that
follow:
a) The access covers are the same covers you removed, and they had classified washers bonded to them. But, the washers fell off or are loose.
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b) The access covers are new and the replacement covers had washers bonded to them.
2) 3) Put the same quantity of washer, in the same positions on the new covers that, were on the old covers.Clean the areas the sealant will touch, with alcohol on a the Cheesecloth.
4) With the sealant, make a fillet all around the edges of the washers.
NOTE:____ The sealant is not permitted between the washers and the intermediate case. It is also not permitted between the washers and the access covers.
(d) (e) (f) (g) (h) 5) Cure the sealant in air that is at ambient temperature, and has a minimum relative humidity of 25 percent. a) Cure the sealant for two hours before you touch it.Tighten the four screws (5) against the two covers (6) and then loosen the screws (5) one full turn.Tighten the six screws (4) against the two covers (6) and then loosen all six screws (4) one full turn.Install the (rear) cover plate (1) to the fan exit fairing (3) with the eight screws (2), lubricated with Engine Oil.Tighten the screws (2) against the cover plate (1) and then loosen the screws (2) one full turn.Tighten the screws (2) to 22 pound-inches (2.486 newton-meters) plus the torque necessary to turn them through the locking feature of the nuts.
NOTE:____ The maximum torque is 40 pound-inches (4.519 newton-meters).
(i) Tighten the four screws (5) to 22 pound-inches (2.486 newton-meters) plus the torque necessary to turn them through the locking feature of the nuts.
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