A 737-300/400/500MAINTENANCE MANUAL
 Air China Group ~........................................................................................................
 | PAGE DATE CODE | PAGE DATE CODE | PAGE DATE CODE || | | || |07-12-00 | ||CHAPTER 7 TAB | 201 MAR 15/96 01 | || | 202 BLANK | ||LIFTING AND SHORING | | || |07-13-00 | ||EFFECTIVE PAGES | 201 MAR 12/00 02 | ||SEE LAST PAGE OF LIST | 202 JUL 15/92 01 | ||FOR NUMBER OF PAGES | 203 JUL 15/92 03 | || | 204 JUL 15/92 03 | || | 205 JUL 15/92 02 | ||7-CONTENTS | 206 NOV 15/97 02 | || 1 JUL 12/00 BEJ | 207 JUL 15/92 02 | || 2 BLANK | 208 MAR 12/00 02 | || | 209 NOV 12/99 02 | ||07-10-00 | 210 MAR 12/00 02 | || 1 MAR 15/93 01 | 211 MAR 12/00 02 | || 2 BLANK | 212 MAR 12/00 02 | || | 213 MAR 12/00 02 | ||07-11-00 | 214 MAR 15/96 02 | || 1 MAR 15/93 01 | 215 MAR 15/96 02 | || 2 BLANK | 216 MAR 12/00 02 | || | 217 MAR 12/00 03 | ||07-11-11 | 218 MAR 12/00 03 | || 201 NOV 15/92 02 | 219 MAR 12/00 02 | || 202 NOV 15/92 01 | 220 BLANK | || 203 MAR 12/01 01 | | || 204 NOV 15/92 03 |07-20-00 | || 205 NOV 15/98 02 | 201 MAR 15/96 01 | || 206 NOV 15/98 03 | 202 BLANK | || 207 JUL 15/97 01 | | || 208 JUL 15/97 01 | | || 209 JUL 15/97 01 | | || 210 JUL 15/97 01 | | || 211 NOV 12/01 02 | | || 212 BLANK | | || | | ||07-11-21 | | || 201 JUL 12/99 01 | | || 202 NOV 12/00 04 | | || 203 NOV 12/00 03 | | || 204 NOV 12/00 03 | | || 205 NOV 12/00 02 | | || 206 BLANK | | || | | ||07-11-31 | | || 201 NOV 12/01 02 | | || 202 NOV 12/01 01 | | || 203 NOV 12/01 02 | | || 204 NOV 12/01 02 | | || 205 NOV 12/01 02 | | || 206 BLANK | | || | | ||07-11-41 | | || 201 MAR 15/96 01 | | || 202 BLANK | | || | | || | | || | | || | | |2..................................…..................................…..................................1
 R = REVISED, A = ADDED OR D = DELETED CHAPTER 07 F = FOLDOUT PAGE EFFECTIVE PAGES 17 PAGE 1 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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 07 - LIFTING AND SHORING
 TABLE OF CONTENTS
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 Chapter Section Subject_______ Subject ____ Effectivity
_______ Page ___________
 LIFTING AND SHORING 07-00-00
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 LIFTING 07-10-00
_______ Description and Operation 1 ALL General 1 LIFTING AIRPLANE FOR MAINTENANCE 07-11-00 Description and Operation 1 ALL General 1 JACK AIRPLANE 07-11-11
 Maintenance Practices 201 ALL Lift Airplane 206 Lower Airplane 209
 JACK AIRPLANE AXLES 07-11-31
 Maintenance Practices 201 ALL
 Jack Nose Landing Gear Axle 203
 JACK AIRPLANE NOSE 07-11-21
 Maintenance Practices 201 ALL
 Lower Airplane Nose 204
 SUPPORT AIRPLANE WITH ENGINES 07-11-41
 REMOVED
 Maintenance Practices 201 ALL
 LIFTING DAMAGED AIRPLANE 07-12-00
 Maintenance Practices 201 ALL
 TILT AIRPLANE FOR TAIL CLEARANCE 07-13-00

 Maintenance Practices 201 ALL Balance Check 206 Lower Airplane Nose 219 Tilt Airplane 201 Tow Airplane 206
 SHORING 07-20-00
_______ Maintenance Practices 201 ALL
 7-CONTENTS

 BEJ Page 1 Jul 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 LIFTING - DESCRIPTION AND OPERATION
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 1.  General_______
 A.  Two general types of airplane lifting will be covered in this chapter: jack airplane for normal maintenance and lifting damaged airplanes.
 B.  When you jack the airplane for normal maintenance, the main and auxiliary jack points are used. The airplane is usually put on jacks for weighing, leveling, alignment checks, and gear retraction.
 C.  When an airplane must be lifted after being damaged, two major factors to be considered are the surface condition and the extent of damage to the airplane. Generally three lifting methods can be used. A simple and safe method of lifting an airplane in small increments is a series of jacks and cribbing. The second method, pneumatic bags, is necessary when the surface beneath the airplane is unstable or muddy. A relatively low air pressure is needed to raise the airplane using pneumatic bags, and the reaction load on the bottom of the bags can be supported better than a more concentrated load on jacks. Tripod jacks should be installed under the main jack points at the earliest opportunity because pneumantic bags are very unstable and are subject to bursting unless they are in good condition and loads are limited to the indicated capacity of the bag. The third method, mobile cranes, can be used on any surface capable of supporting large cranes. However, mobile cranes cannot be used if the main landing gear support beams have sustained structural damage. During any lifting operation, only approved procedures for lifting and handling the airplane shall be used.
　
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