HomeAD libraryAD 90-20-21Airworthiness Directive · Amendment 39-6745 · Bombardier Inc. AirplanesAD 90-20-21Bombardier Inc. AirplanesAirplanePublishedOctober 26, 1990EffectiveOctober 26, 1990MakerBombardier Inc.SupersedesNothingApplies toThis AD applies to Bombardier Inc. DHC-8-101, DHC-8-102, DHC-8-103, DHC-8-106.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 90-20-21 for its current status and any corrections
