GENERAL / FASTENERS 2-31
CHANGE C3 ICON A5 / MAINTENANCE MANUAL
2.20.5 Castle Nuts
Castle nuts shall be installed per AC43-13.1B, Chapter 7, Table 7-1 and section 7-40, paragraph (f).
2.20.6 Clevis Pins
Clevis Pins shall be installed per AC43-13.1B, Chapter 7, section 7-102. A flat washer shall be used
under the cotter pin.
2.20.7 Cotter Pins
Cotter pins shall be used with Clevis pins and/or Castle nuts as required. Cotter pins shall be installed
per AC43-13.1B, Chapter 7, sections 7-103 and 7-127.
2.20.8 Threaded Taper Pins
Taper pins shall be used in joints which carry shear loads and where no play is allowable. Taper pins
shall be installed per AC43-13.1B, Chapter 7, sections 7-101, using AN975 washers and castle nuts with
cotter pins or locking pins.
Taper pin holes shall be reamed using the appropriate taper pin reamers to a depth necessary to
ensure washer and nut compression on the taper pin.
Any taper pins not meeting inspection criteria shall be removed and replaced.
2.20.9 Safety Wire
Safety wire shall be used on bolts, nuts or fittings as required. Safety wire shall be installed per
AC43-13.1B, Chapter 7, sections 7-122 through 7-126.
2.20.10 Turnbuckles
Turnbuckles shall be installed and inspected per AC43-13.1B, Chapter 7, sections 9 and 10.
Any turnbuckles not meeting inspection criteria shall be removed and replaced.
2.20.11 Threadlocker
Threadlocker (e.g. LOCTITE
®
, Permatex, etc.) shall only be used if Nord-Lock washers are not speci-
fied. Threadlocker shall be installed per the manufacturer’s instructions for the particular threadlocker
specified. Surface to have threadlocker applied shall be clean and free of grease, oil or contaminants.
Surfaces shall be cleaned with isopropyl alcohol prior to threadlocker application.
Threadlocker shall only be used within its applicable shelf life, if any, as defined by the manufacturer.
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