72-31-01
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
SEE
L-B8654
M46800
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72-31-01
ALL ú ú N01 Page 811 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(2) S 028-046-N00Remove the front segment of the inlet cone (AMM 72-31-01/401).
(3) S 028-047-N00Do the steps that follow to repair the bolt pocket of the front segment of the inlet cone. (a) Clean the damaged area (AMM 70-00-00/201). (b) If necessary, use a soft non-metallic brush or pad. (c) Dry with clean cotton cloth.
(4) S 358-048-N00Lightly abrade the repair area with #180 grit paper or #240 grit abrasive being careful not to damage the Kevlar layers under the fiberglass. (a) Clean by using Isopropyl Alcohol (AMM 70-42-04/201). (b) Let air dry for 30 minutes minimum.
NOTE:____ Alcohol which has not completely dried prevents the curing of the silicone rubber adhesive.
(5) S 398-049-N00Apply silicone Sealant to the area as follows: (a) Apply a thin layer of sealant to the repair area and feather smooth with a trowel to about 0.020 inch (0.508 mm) thick to make surface smooth and consistant and recreate the fillet.
(6) S 398-050-N00Let the sealant cure, without heat, for a minimum of 4 hours.
(7) S 418-051-N00Install the front segment of the inlet cone (AMM 72-31-01/401).
(8) S 088-052-N00Remove the protective mat from the inlet cowl.
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72-31-01
ALL ú ú N01 Page 812 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
1ST-STAGE (FAN) BLADE - REMOVAL/INSTALLATION
____________________________________________
1. General
_______
A. This procedure has four tasks for the removal and installation of the fan blades.
(1) The first and third tasks are for damaged fan blades. You can replace one blade that has the same moment as the one you remove. You can also replace two blades, a matched moment set, that are 180° apart.
NOTE: A matched moment set is a pair of blades that have the same
____
moment weight (moment of inertia).
(2)
The second and fourth tasks are for maintenance. You can remove all of the fan blades as a full set.
B.
The 1st-stage fan blades are the first stage of blades of the low pressure compressor (LPC).
C.
You can go into the inlet cowl to get access to the 1st-stage fan blades.
TASK 72-31-02-004-001-N00
2. Fan Blade Removal (One or Two)
______________________________
A. General
(1)
This procedure gives the steps for the removal of one fan blade or the removal of two fan blades that have the same moment.
B.
Special Tools and Equipment
(1)
Fixture - Support (PWA 85035), Pratt & Whitney, Commercial Products Division, 400 Main Street, East Hartford, CT 06108
C.
Standard Tools and Equipment
(1)
Mat - Protective, rubber Manufacturer's Association, Grade SC43, neoprene sponge, 1 inch thick, approximately 5 x 6 feet with warning streamers attached (3 required)
(2)
Pin Punch - locally available
(3)
Gloves - locally available
D.
References
(1)
AMM 72-31-01/401, Inlet Cone
(2)
IPC 72-31-02 Fig. 5
E.
Access
(1)
Location Zone
412 Engine 1 - LPC Hub
422 Engine 2 - LPC Hub
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：747-400 AMM 飞机维护手册 发动机 ENGINE 1(142)
