Standard Practice - Type Particulat

By -

TTP
B1-L1
ATA20
Cessna 172
B2-L1


Chapter 20 describes standard maintenance practices and safety precautions applicable to all aspects of the airframe and related systems.
1.    Material and Tool Cautions describes general cautions and warnings applicable to maintenance on or around the airplane.
2.    Torque Data provides tables, formulas, requirements and torque limits for various type fasteners.
3.    Safetying describes the proper methods and use of safety wire/lockwire, cotter pins and lock clip installations.
4.    Solvents describes characteristics of solvents which are commonly used during
maintenance, cleaning and inspection of various airframe and related components.
  
PTP
Cessna
172
B1
LOC

SGH

B2
LOC

SGH


  Torque Data To ensure security of installation and prevent over stressing of components during installation, the torque values outlined in MM should be used during installation and repair of components.
Torque value tables, in Ch.20, are standard torque values for the nut and bolt combinations shown. If a component requires special torque values, those values will be listed in the  maintenance practices section.
Free Running Torque Value. is the torque value required to rotate a nut on a threaded shaft, without tightening. Free running torque value does not represent the torque values listed in the tables of this section. Torque values listed in the tables represent the torque values above free running torque.
Breakaway torque value is the value of torque required to start a nut rotating on a thread shaft, and does not represent free running torque value. It should be noted that on some installations the breakaway torque value cannot be measured.

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