AC 23-27 parts amd material substitutions in vintage aircraft

[astjp2]

parts amd material substitutions in vintage aircraft

[astjp2]

Re: AC 23-27 parts amd material substitutions in vintage aircraft

BEARINGS. Bearing catalogs from general bearing supply houses state in their introductions that the bearings listed in their catalog meet ANSI (American National Standards Institute) specifications or exclusions. They also give cross-references. Usually, they list bearings for aviation applications. You must use the appropriate part from the cross-reference matrix.

Approval: This is a minor alteration and you may document it by a logbook entry. The logbook entry must reference the manufacturer's identification and industry specification for the original and replacement bearing.