A 737-300/400/500MAINTENANCE MANUAL
R = REVISED, A = ADDED OR D = DELETED CHAPTER 51 F = FOLDOUT PAGE EFFECTIVE PAGES 17 B PAGE 2 JUL 12/02 LAST PAGE
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
CHAPTER 51 - STRUCTURES
TABLE OF CONTENTS
_________________
Chapter
Section Subject_______ Subject ____ Effectivity
_______ Page ___________
STRUCTURES 51-00-00
__________ Description and Operation 1 ALL
REDUCED VERTICAL SEPARATION MINIMUMS 51-10-00
____________________________________ (RVSM)
______
Inspection/Check 601 ALL
WINDOW, DOOR AND HATCH LEAK CHECK 51-11-00
Inspection/Check 601 ALL
STRUCTURE FINISHES 51-20-00
__________________
FINISHES - PROTECTIVE 51-21-00
Description and Operation 1 ALL
Cleaning/Painting 701 ALL
ABRASION RESISTANT MOLYBDENUM 51-21-94
DISULFIDE
Cleaning/Painting 701 ALL
CLEANING AND TREATMENT -51-21-21
PREPAINT
Cleaning/Painting 701 ALL
COATING - ALODINE 51-21-41
Cleaning/Painting 701 ALL
COATING - HIGH 51-21-96
TEMPERATURE(TITANIUM)
Cleaning/Painting 701 ALL
COATING - INORGANIC PROTECTIVE, 51-21-98
HEAT, WEATHER AND OIL RESISTANT
Cleaning/Painting 701 ALL
COATING, CONDUCTIVE - FOR 51-21-71
EXTERIOR FIBERGLASS AND KEVLAR
Cleaning/Painting 701 ALL
COMPOUND, CORROSION INHIBITING 51-21-91
Cleaning/Painting 701 ALL
CORROSION REMOVAL AND CONTROL 51-21-31
Cleaning/Painting 701 ALL
DECORATIVE EXTERIOR PAINT SYSTEM 51-21-99
Cleaning/Painting 701 ALL
FINISH - HYDRAULIC FLUID 51-21-61
RESISTANT
Cleaning/Painting 701 ALL
FINISH - INTUMESCENT (HEAT 51-21-12
PROTECTIVE)
Cleaning/Painting 701 ALL
51-CONTENTS
BBEJ Page 1 Jul 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
CHAPTER 51 - STRUCTURES
TABLE OF CONTENTS
_________________
Chapter Section Subject_______ Subject ____ Effectivity
_______ Page ___________
FINISH - NONGLARE 51-21-93 Cleaning/Painting 701 ALL FINISH - NONSKID 51-21-97 Cleaning/Painting 701 ALL FINISH, TEFLON - ABRASION 51-21-81 RESISTANT Cleaning/Painting 701 ALL FLOOR TRACK CORROSION PREVENTION 51-21-92 Maintenance Practices 201 ALL MAGNESIUM - CLEANING/PAINTING 51-21-51 (CONVERSION COATING) Cleaning/Painting 701 ALL SKIN AND FASTENER CORROSION 51-21-95 REMOVAL AND CONTROL Cleaning/Painting 701 ALL STRIPPING - PAINT 51-21-11 Cleaning/Painting 701 ALL
SEALS AND SEALING 51-30-00
_________________
SEALS AND SEALING 51-31-00
Description and Operation 1 ALL
Maintenance Practices 201 ALL
DRAINAGE 51-40-00
________
AIRFRAME DRAINAGE 51-41-00
Description and Operation 1 ALL
DRAINAGE - EXTERNAL 51-41-11
Inspection/Check 601 ALL Approved Repairs 801 ALL DRAINAGE - INTERNAL 51-41-12 Inspection/Check 601 ALL VALVE - FUSELAGE DRAIN 51-41-13 Removal/Installation 401 ALL
RUB PADS 51-50-00
________ BONDED RUB PAD 51-51-00 Approved Repairs 801 ALL
51-CONTENTS
BBEJ Page 2 Nov 12/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
STRUCTURES - DESCRIPTION AND OPERATION
______________________________________
1. General_______
A. The structure of the airplane (Fig. 1) is designed to provide maximum strength with minimum weight. This object has been achieved by designing alternate load paths into the structure, so that a failure of one segment cannot endanger the airplane, and also by the use of appropriately selected materials. The materials most commonly used thoughout the structure are aluminum, steel, and magnesium alloys. Of these, the most extensively used are certain aluminum alloys selected according to the particular type of load they are best suited to withstand.
B. Aluminum and fiberglass honeycomb core material is used extensively on secondary areas of structures and many of the flight surfaces.
C. Maintanance practices concerning blowout doors and panels are covered in applicable chapters on structures. See Fig. 3 for a comprehensive illustration of blowout doors and panels on the airplane.
2. Fuselage________
A. The fuselage is a semimonocoque structure with the skin reinforced by circumferential frames and longitudinal stringers. It is composed of four sections: body sections 41, 43, 46, and 48, of which the forward three together extend from body station 178 to body station 1016 and contain all the passenger, crew, and cargo accommodations. The fourth section of the fuselage is at the aft end and provides support for the empennage.
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