20-33 Special Torques (continued)
AREA* FASTENER*
TORQUE
(IN.-LB)*
POWERPLANT
(CONT'D)
(2) nuts, securing harness wires to starter-generator large terminals,
starter-generator supplied
180
(1) nut, securing harness wire to ignition exciter box, engine-supplied 15
(2) nuts, securing harness and (2) MS21919WCH4 clamps to engine
accesory gearbox, engine-supplied
40
(4) nuts, securing F577-1 bracket assembly, engine-supplied 40
(2) tee bolts, securing F173-1 struts to engine, engine-supplied 35-40
(2) AN815-8D unions, engine oil outlet and oil tank vent 250
(1) AN815-10D union, engine oil inlet 375
(1) AN919-0D reducer and (1) AN919-2D reducer 100
(2) NAS6605-3 bolt, securing G200-1 lug to engine (optional) 110
(6) NAS6605H3 bolts, securing (2) F593-1 support assemblies to
engine
110
(2) NAS6605H4 bolts and (1) NAS6605H2 bolt, securing F593-3
plate to engine
110
(1) CV26-77 check valve, engine oil outlet (early R66s) 250
SWASHPLATE
(26) NAS1352N08-8 screws, securing spacers, sleeve assembly,
shield, and retainers
35 wet
(2) NAS1352N08-4 screws, securing B769-2 bracket 35
TAIL ROTOR
(1) D210-4 nut, securing C119-2 bumper 120
(1) NAS6606-53 bolt, teeter hinge 380
TAIL ROTOR
FLIGHT CONTROLS
(1) D210-4 nut, outboard of F316-1 bellcrank assembly 90
TAIL ROTOR
GEARBOX
(1) A610-1 vent assembly 100
(1) B563-4 sight gage 150
(1) B566-2 chip detector 100
(1) D210-5 nut, pitch control housing 240
(1) AN320-8 nut, input yoke 35-45 FT-LB
(4) MS20074-04-06 bolts, input cap 60
(8) MS20074-04-06 bolts, input housing and output cap 100
(4) NAS1352-5-12P bolts (undrilled), gearbox-to-tailcone
attachment
260
TAIL ROTOR
GUARD
(1) NAS1352-3-14P screw, securing block assembly to stabilizer 40
WINDOWS (22) AN526C832R12 screw, thru center brace 16
* 1. Values include nut self-locking torque.
2. Increase values 10% if torqued at bolt head.
3. For elbow & tee fittings which require alignment, torque to indicated value then tighten to desired position.
4. Values ± 10% unless range is specified.
5. Unless otherwise noted, thread sizes 8-32 & smaller are not used for primary structure & do not require
specific torque.
MAY 2015 Chapter 20 Standard Practices Page 20.11
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