Airworthiness Directive · Amendment 39-9058 · Arrow Falcon Exporters, Inc., AST, Inc, Bell Helicopter Textron, Inc., California Department of Forestry, Global Helicopter Technology, Inc., Hagglund Helicopters, LLC, International Helicopters, Inc., Overseas Aircraft Support Inc, Richards Heavylift Helo, Inc., Robinson Air Crane, Inc., Rotorcraft Development Corporation, San Joaquin Helicopters, Smith Helicopters, Sout
Arrow Falcon Exporters, Inc., AST, Inc, Bell Helicopter Textron, Inc., California Department of Forestry, Global Helicopter Technology, Inc., Hagglund Helicopters, LLC, International Helicopters, Inc., Overseas Aircraft Support Inc, Richards Heavylift Helo, Inc., Robinson Air Crane, Inc., Rotorcraft Development Corporation, San Joaquin Helicopters, Smith Helicopters, Sout
This AD applies to Arrow Falcon Exporters, Inc., AST, Inc, Bell Helicopter Textron, Inc., California Department of Forestry, Global Helicopter Technology, Inc., Hagglund Helicopters, LLC, International Helicopters, Inc., Overseas Aircraft Support Inc, Richards Heavylift Helo, Inc., Robinson Air Crane, Inc., Rotorcraft Development Corporation, San Joaquin Helicopters, Smith Helicopters, Southern Helicopter, Inc., Southwest Florida Aviation International, Tamarack Helicopters, Inc., West Coast Fabrications UH-1H, UH-1F, TH-1L, UH-1E, UH-1L, UH-1B, UH-1A, TH-1F, UH-1P.
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 airworthiness directive (AD), applicable to Bell Helicopter Textron, Inc. restricted category military Model UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and TH-1L helicopters, that currently requires an inspection before the first flight of each day of certain tail rotor drive shafts and the tail rotor drive shaft hanger bearings (bearings) for grease leakage, security, overheat conditions, binding, or roughness until the bearings are replaced. This amendment requires the same inspection of the bearings, but also requires replacement of the affected bearings within the next 100 hours time-in-service and extends the requirements of this AD to the Model UH-1P and TH-1F helicopters that were recently type certificated. This amendment is prompted by an accident involving a bearing failure, and by the certification of two additional affected helicopter models. The actions specified by this AD are intended to prevent failure of the bearing, failure of the tail rotor drive shaft, 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.
