HomeAD libraryAD 86-23-51Airworthiness Directive · Amendment 39-5659 · Columbia Helicopters, Inc. HelicoptersAD 86-23-51Columbia Helicopters, Inc. HelicoptersRotorcraftPublishedJuly 20, 1987EffectiveJuly 20, 1987MakerColumbia Helicopters, Inc.SupersedesNothingApplies toThis AD applies to Columbia Helicopters, Inc. 234.The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.Official sourcesThe AD at the FAA · its text as the FAA keeps itFAA Dynamic Regulatory System (DRS) · search 86-23-51 for its current status and any corrections
