EffectivityALL
ALLALL
54-CONTENTS
GUN Page 3 Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
CHAPTER 54 - NACELLES/PYLONS
TABLE OF CONTENTS_________________
Chapter
Section
Subject Subject_______ _______ Page____ Effectivity___________
FAIRINGS 54-61-00
Description and Operation 1 ALL
General 1
Fairings - Aft 1
Fairings - Forward 1
Fairings - Strut-to-Wing 1
Fairings - Thrust 1
Reverser-to-Strut
FAIRING PANEL NO. 3 - AFT THRUST 54-61-01
REVERSER-TO-STRUT
Removal/Installation 401 ALL
NACELLE STRUT ACCESS PANELS 54-62-00
Description and Operation 1 ALL
General 1
Doors - Pressure Relief 6
Doors - Strut Access 1
Doors - Trailing Edge Fairing 6
Maintenance Practices 201 ALL
General 201
Close Trailing Edge Fairing 207
Door
Install Access Door 203
Open Trailing Edge Fairing 204
Door
Remove Access Door 201
DOOR - NACELLE STRUT ACCESS 54-62-02
Adjustment/Test 501 ALL
Pressure Relief Door 512
Adjustment
Pressure Relief Door 514
Functional Check
Pressure Relief Door Latch 502
Test
DOORS - TRAILING EDGE FAIRING 54-62-03
Removal/Installation 401 ALL
Adjustment/Test 501 ALL
Trailing Edge Fairing Door 501
Adjustment
54-CONTENTS
GUN Page 4 Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL CHAPTER 54 - NACELLES/PYLONS TABLE OF CONTENTS
_________________
Chapter
Section
Subject_______ Subject_______ Page____ Effectivity___________
Inspection/Check 601 ALL
FAIRING - FORWARD 54-62-04
Removal/Installation 401 ALL
54-CONTENTS
GUN Page 5 Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
NACELLES/PYLONS - DESCRIPTION AND OPERATION
___________________________________________
1. General_______
A. Nacelles/Pylons consist of the items that follow:
(1)
Nacelle Strut Assembly, AMM 54-51-00/001
(2)
Fireseal and Firewall, AMM 54-52-00/001
(3)
Strut Drains, AMM 54-53-00/001
(4)
Fairings, AMM 54-61-00/001
(5)
Nacelle Strut Access Panels, AMM 54-62-00/001
B. Refer to AMM 71-11-00/001 for description of Engine Nacelles.
C. Two engines are installed on each wing by means of nacelle struts (pylons). Struts are essentially frame and skin structures riveted and bonded together to form a torque box. Outside skins are adhesive bonded laminates which are rivet bonded to stringers, bulkheads, spars and frames to form the strut understructure. Lower spar and engine mount bulkheads are made of steel. Stainless steel or titanium is used where high strength and heat and fire resistance is required.
D. The nacelles and strut fairings fair the wing to the engine. Access doors in strut fairings are provided where necessary to allow access to components located in the strut.
E. A one-inch wide stripe is located below the strut midspar fuse pin acces cover, on the inboard and outboard sides of each strut (Fig. 1). When the stripe is not aligned between the strut skin and the trailing edge fairing door or skirt beam fairing, it can show a fully fractured midspar fuse pin or midspar attach fitting (FIM 54-10-00/101). Misalignment of
0.50 inch (12.7 mm) or more is cause for fuse pin inspection.
F. Alignment stripe AMM references:
(1)
AMM 54-51-02/401, Nacelle Strut Attach Pin/Bolt
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