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STANDARD PRACTICES / AIRFRAME
DESCRIPTION AND OPERATION
1. GENERAL
The use and application of the products and general hardware necessary for the maintenance of aircraft are described in the "Standard Practices / Airframe" chapter. This chapter includes procedures, practices and processes that are not specifically covered in other chapters of the Maintenance Manual. The information is given in the form of tables, charts, illustrations and technical data to aid the general maintenance of the aircraft.
This chapter also includes the list of materials — refer to 20-10-00. For Standard Practices — Structures — refer to Chapter 51.
For Standard Practices — Power Plant — refer to Engine Maintenance Manual.
I AAAA
Validity : S / N 1 — 9999 20-00 00 (BA) Page 1 DEC 98
 
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I AAAA
Validity : S / N 1 — 9999 20-00-00Page 2
(BA) DEC 98
 
TIGHTENING TORQUES
MAINTENANCE PRACTICES
1. SERVICING
The following tables contain the tightening torques of attachments and hinges to be checked during scheduled inspections or during re-assembly whenever parts have been removed for aircraft transportation or scheduled inspection purposes.
This chapter gives the normal torque values. From the normal values, tolerances are : minus 0 (zero) plus 15 % (fifteen per cent of the normal values).
The tightening torque values are to be applied on parts previously protected with grease or oil. In this case, these assemblies are called : "WET".
In some exceptional cases, assemblies may be used without protection products. For these "DRY" assemblies, the values of the table below will be doubled.
A. Tightening torque general values for "wet" assemblies
Effective for steel when T.S. = 680 MPa minimum.
Use trip torque wrench preferably. Same torque for tightening nut or screw head.
Dia. Pitch Torques in N.m Torques in lbf.in
  Nuts Nuts
  Normal Self-locking Normal Self-locking
4 0.7 1.2 1.5 11 13
5 0.8 2 2.5 18 22
6 1 3.5 4.5 31 40
8 1.25 9 11 79 97
10 1.5 20 25 177 221
12 1.5 37 45 327 398
14 1.5 60 70 531 619
16 1.5 95 115 840 1017

NOTE : The tightening torque values given in lbf.in have been rounded off.
I ABAA
Validity : S / N 1 - 9999 20-00-01Page 201
(BA) DEC 98
 
B. Tightening torque values for "wet" assemblies - Specific cases (Figures 201, 202, 203, 204, 205 and 206)
Item Attachment designation Bolt Torques
in N.m Torques
　
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本文鏈接地址：TB20 MAINTENANCE MANUAL 20 STANDARD PRACTICES AIRFRAME TB20飛機維護手冊 20 標準施工機體(7)