Game Composites GB1 GameBird, Maintenance Manual

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Maintenance Manual GB1 GameBird
Page date: April 24, 2020
20-2
General
This chapter contains torque values, description of standard components, fasteners and sealants, as well as
instructions for disassembly, shipping and reassembly of the airplane.
Threaded Fasteners & Torque Values
Always tighten the nut or bolt to the torque shown below unless otherwise stated.
Always use the correct locking device with the nut or bolt.
Discard self-locking nuts after removal, as the friction torque reduces with use.
On all bolt connections, the specific torque and locking method must be observed.
The bolts used for the airplane are AN- Bolts (Army / Navy).
The bolts can be identified by the marking on the bolt head and by the surface treatment.
Standard installation torque values for AN fasteners:
Type
Thread
size
Torque value
(Nm)
Torque value
(ft.lb)
AN3 10-32 1.6 1.2
AN4 1/4-28 7.0 5.2
AN5 5/16-24 13.6 10.0
AN6 3/8-24 28.5 21.0
AN7 7/16-20 38.5 28.0
AN8 1/2-20 54.2 40.0
AN9 9/16-18 91.0 67.0
AN10 5/8-18 125.0 92.0
Special torque values
Location and Item
Torque value
(Nm)
Torque value
(ft.lb)
Engine to Engine Mount:
NAS363-720 (metal stop nut)
55 41
Brake caliper bolt: AN4H-12A 10 7.3
Engine components See Lycoming Manual
Propeller components See MT-Propeller Manual