HomeAD libraryAD 93-14-21Airworthiness Directive · Amendment 39-8646 · The Boeing Company AirplanesAD 93-14-21The Boeing Company AirplanesAirplanePublishedAugust 9, 1993EffectiveAugust 9, 1993MakerThe Boeing CompanySupersedesNothingApplies toThis AD applies to The Boeing Company 747-400 Series, 747-400D Series.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 93-14-21 for its current status and any corrections
