(3)
Installation of replacement lockwire and nuts for the fan exit vanes.
(4)
Repair of broken vane platforms.
(5)
Repair of damaged flanges on the fan exit case.
(6)
Repair of the fan exit vane leading edge with tape.
(7)
Patch repair of larger damage on the leading edge of fan exit vanes.
(8)
Installation of fan exit vanes to replace vanes that are damaged or not there. You must fully remove at least one vane to do this task.
(9)
Repair of the airfoil of the vane with a partial or full span replacement of the wire mesh leading edge.
(10)
Repair the airfoil of the vane with a metal shield over the leading edge.
B.
The fan exit vanes (fan exit guide vanes) will be refered to as a vane.
TASK 72-33-02-308-059-N00
2. Patch Repair of the Fan Exit Vanes (Smaller Damage on all Areas)
________________________________________________________________
A. Consumable Materials
(1)
G00842 Cheesecloth, Unsized (PWA P05-038)
(2)
G02167 Sandpaper - 240-400 Grit
(3)
G02150 Wetting Agent (PWA P05-152)
(4)
Wire cloth (PWA P05-182)
(5)
A00021 Adhesive, Paste Epoxy, EA934 (PWA P08-016)
(6)
B00130 Alcohol - Isopropyl
B.
References
(1)
AMM 71-11-04/201, Fan Cowl Panels
(2)
AMM 71-11-06/201, Core Cowl Panels
(3)
AMM 72-33-02/601, Fan Exit Case and Vane
(4)
AMM 78-31-00/201, Thrust Reverser System
C.
Access
(1)
Location Zone
412 Engine 1 - Fan Exit Case
422 Engine 2 - Fan Exit Case
432 Engine 3 - Fan Exit Case
442 Engine 4 - Fan Exit Case
(2)
Access Panel 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
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-33-02
ALL ú ú N01 Page 801 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
D. Prepare for Repair of the Fan Exit Vanes
S 018-021-N00
(1) Open the fan cowl panels (AMM 71-11-04/201).
S 048-022-N00
WARNING: DO THE DEACTIVATION PROCEDURE TO PREVENT THE OPERATION OF THE
_______
THRUST REVERSERS. ACCIDENTAL OPERATION OF THE THRUST REVERSER
CAN CAUSE INJURY TO YOU AND DAMAGE TO EQUIPMENT.
(2)
Do the Deactivation Procedure for the thrust reverser for ground
maintenance (AMM 78-31-00/201).
S 018-023-N00
(3)
Open the core cowl panels (AMM 71-11-06/201).
S 018-024-N00
WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO OPEN THE THRUST
_______
REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURY TO YOU
AND DAMAGE TO EQUIPMENT CAN OCCUR.
(4)
Open the thrust reversers (AMM 78-31-00/201).
E.
Patch Repair for the Fan Exit Vanes (Small Damage, All Areas) (Fig. 801)
NOTE: In this procedure, the words "damage" and "repair area" are not
____
the same thing. The repair area is larger than the area of the
damage. The repair area includes the area that you clean, sand,
and put the patch.
S 218-025-N00
(1)
Find the damage that you must repair with a small patch
(AMM 72-33-02/601).
S 118-026-N00
(2)
Clean the area around the damaged fan exit vane with a soft brush
and a solution of wetting agent and water.
(a)
Flush with water and permit to air dry.
S 358-027-N00
(3)
Sand the repair area lightly with 240-400 grit sandpaper.
(a)
In area B, when you sand the repair area, make sure the area becomes larger by no more than 0.025 inch (0.635 mm). 1) This slight increase in area will smoothen out any sharp
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