Airworthiness Directive · Amendment 39-10521 · Arrow Falcon Exporters, Inc., California Department of Forestry, Rotorcraft Development Corporation, San Joaquin Helicopters, International Helicopters, Inc., Robinson Air Crane, Inc., Smith Helicopters, Southern Helicopter, Inc., Southwest Florida Aviation International, Tamarack Helicopters, Inc., US Helicopter, Inc., Richards Heavylift Helo, Inc., Hagglund Helicopters,
Arrow Falcon Exporters, Inc., California Department of Forestry, Rotorcraft Development Corporation, San Joaquin Helicopters, International Helicopters, Inc., Robinson Air Crane, Inc., Smith Helicopters, Southern Helicopter, Inc., Southwest Florida Aviation International, Tamarack Helicopters, Inc., US Helicopter, Inc., Richards Heavylift Helo, Inc., Hagglund Helicopters,
Superseded. A later AD replaced this one: AD 99-25-12. Comply with the one in force.
This AD applies to Arrow Falcon Exporters, Inc., California Department of Forestry, Rotorcraft Development Corporation, San Joaquin Helicopters, International Helicopters, Inc., Robinson Air Crane, Inc., Smith Helicopters, Southern Helicopter, Inc., Southwest Florida Aviation International, Tamarack Helicopters, Inc., US Helicopter, Inc., Richards Heavylift Helo, Inc., Hagglund Helicopters, LLC, Overseas Aircraft Support Inc UH-1H, UH-1F, TH-1F, TH-1L, UH-1B, UH-1E, UH-1L, UH-1P, SW204 (UH-1B), SW204HP (UH-1B), SW205 (UH-1H), SW205A-1, UH-1A.
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.
This amendment supersedes an existing priority letter airworthiness directive (AD), applicable to Bell-manufactured Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and UH-1P helicopters; and Southwest Florida Aviation SW204, SW204HP, and SW205 helicopters, that currently requires modification and inspections of the vertical fin spar. This amendment requires the same modification and inspections required by the existing priority letter AD, but adds the Southwest Florida Aviation Model SW205A-1 and Utah State University UH-1H helicopters to the applicability of this AD. This amendment is prompted by accidents involving in-flight failure of the tailboom vertical fin spar. The actions specified by this AD are intended to prevent in-flight failure of the vertical fin spar and subsequent loss of control of the helicopter.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
