Airworthiness directives › 2021-15-52
AD 2021-15-52 Airworthiness Directives; Various Restricted Category Helicopters
Makes named: robinson. Models named: HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, UH-1P. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to various restricted category helicopters originally manufactured by Bell Textron Inc. (Bell), certificated in any category, with an outboard main rotor hub strap pin (pin) part number 204-012-104-005 with a serial number prefix “FNFS” installed. These helicopters include but are not limited to: (1) Rotorcraft Development Corporation Model HH-1K helicopters; (2) Robinson Air Crane Inc.; Rotorcraft Development Corporation; and Tamarack Helicopters, Inc., Model TH-1F helicopters; (3) Bell; Overseas Aircraft Support, Inc. (type certificate previously held by JTBAM, Inc.); and Rotorcraft Development Corporation Model TH-1L helicopters; (4) Richards Heavylift Helo, Inc., Model UH-1A helicopters; (5) International Helicopters, Inc.; Overseas Aircraft Support, Inc.; Red Tail Flying Services, LLC; Richards Heavylift Helo, Inc.; Rotorcraft Development Corporation; Southwest Florida Aviation International, Inc.,; and WSH, LLC (type certificate previously held by San Joaquin Helicopters), Model UH-1B helicopters; Note 1 to paragraph (c)(5): Helicopters with an SW204 or SW204HP designation are Southwest Florida Aviation International, Inc., Model UH-1B helicopters. (6) Bell; Overseas Aircraft Support, Inc.; Rotorcraft Development Corporation; Smith Helicopters; and West Coast Fabrications Model UH-1E helicopters; (7) AST, Inc.; California Department of Forestry; Robinson Air Crane, Inc.; Rotorcraft Development Corporation; and Tamarack Helicopters, Inc., Model UH-1F helicopters; (8) Arrow Falcon Exporters Inc.; Global Helicopter Technology, Inc.; Hagglund Helicopters, LLC; JJASPP Engineering Services, LLC; Northwest Rotorcraft, LLC; Overseas Aircraft Support, Inc.; Richards Heavylift Helo, Inc.; Rotorcraft Development Corporation; Southwest Florida Aviation International, Inc.; and Tamarack Helicopters, Inc., Model UH-1H helicopters; Note 2 to paragraph (c)(8): Helicopters with an SW205 designation are Southwest Florida Aviation International, Inc. Model UH-1H helicopters. (9) Bell; Overseas Aircraft Support, Inc.; and Rotorcraft Development Corporation Model UH-1L helicopters; and (10) Robinson Air Crane, Inc.; and Rotorcraft Development Corporation Model UH-1P helicopters.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Before further flight, remove from service any pin that is identified in the introductory text of paragraph (c) of this AD. (2) As of the effective date of this AD, do not install any pin that is identified in the introductory text of paragraph (c) of this AD on any helicopter.
Unsafe condition
This AD was prompted by a fatal accident in which a pin sheared off during flight, which resulted in the main rotor blade and the main rotor head detaching from the helicopter. The FAA is issuing this AD to address this unsafe condition and prevent loss of control of the helicopter.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1