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AC NO: 20-45Federal Aviation Agency
AIRCRAFT EFFECTIVE :
9/17/65 S U 8 JEC T : SAFETYING OF TURNBUCKLES ON CIVIL AIRCRAFT
1. PURPOSE. To provide information on turnbuckle safetying methods that have been found acceptable by the Agency during past aircraft type certification programs.
2. INFORMATION. The following cable system turnbuckle safetying devices have been approved, under current airworthiness regulations, for use in civil aircraft:
a. Clip locking devices specified in military standard MS 33736;
b. Double-wrap safety wire as specified in military standard MS 33591; and
c. Turnbuckle safetying devices meeting TS0-C21.
h. ,/2. {~. {_tJJ..l~ G~\;;g~ S. Moore 1 Director Flight Standards Service fi6-.362i