The FAA recommends in AC 43-13b that fiber or nylon locknuts not be used where these will be subject to high temperatures. (What constitutes high temperature is not defined.) All metal locknuts should be used in high temperature applications. In theory the high temperature will cause the fiber or nylon to shrink and loose grip on the bolt threads. My estimate is brake calipers and associated hardware would be routinely subject to high temperatures. I have seen aircraft tires that were smoking due to hard braking action. The rims were hot also. Definitely use all metal locknuts on wheel rim bolts. PULLEEASE deflate the tire before loosening any rim bolts.
Steve Bennett has been putting his VW engine cases together for many years using nylon locknuts and none have fallen apart yet. Head bolts and exhaust flanges are a whole other matter. Sid Wood Tri-gear KR-2 N6242 Mechanicsville. MD, USA sidney.w...@l-3com.com >...The wheel attached to the landing gear main has four bolts with fiber lock nuts, is this acceptable?... IHS PatS Seminary, MS
