# AD 80-17-09: Main Rotor Straps - Type: Airworthiness directive - Status: Historical - Products: Bell Helicopter Textron 204B, 205A-1, 212, 214B, 214B-1, UH-1F, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, UH-1P and 7 more - Effective: September 15, 1980 - Superseded by: [AD 2002-22-14](https://openairdocs.org/ad/2002-22-14) - Product type: Aircraft, Rotorcraft - Amendment: 39-3876 - Registered aircraft: 496 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0A5143DA8347742986256A4D00739DA1.0001 - DRS record last changed: August 7, 2025 - Page: https://openairdocs.org/ad/80-17-09 ## The airworthiness directive 80-17-09 BELL: Amendment 39-3876. Applies to Models 204B, 205A-1, 212, 214B, and 214B-1 helicopters and military UH-1 series helicopters certified in all categories. Compliance required as indicated for helicopters equipped with main rotor straps, P/N 204-012-122-1, -5, or 214-010-179-1. To preclude possible separation of a main rotor blade tension-torsion strap and loss of a main rotor blade, accomplish the following: a. Within the next 100 hours' time in service after the effective date of this airworthiness directive (AD), remove and replace main rotor straps having: (1) 1,100 or more hours of total time in service on the effective date of this AD, or (2) 24 or more months elapsed calendar time in service as of the effective date of this AD, whichever comes first. b. Remove and replace main rotor straps having less than 1,100 hours' total time in service or having less than 24 months elapsed time in service on the effective date of this AD:(1) Prior to attaining 1,200 hours' total time in service, or (2) Prior to exceeding 24 months elapsed time in service, whichever comes first. c. The helicopter may be flown in accordance with FAR's 21.197 and 21.199 to a base where this AD may be accomplished. (Bell Helicopter Textron Alert Service Bulletin No. 212-80-17 pertains to this subject.) This amendment becomes effective September 15, 1980. ## Affected data sheets (6) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS H1SW](https://openairdocs.org/tcds/H1SW): Bell Textron Inc.; names 2 of 5 models: 204B, 205A-1 - [TCDS H4NM](https://openairdocs.org/tcds/H4NM): Bell Textron Inc.; names 2 of 3 models: UH-1E, UH-1L - [TCDS H6SW](https://openairdocs.org/tcds/H6SW): McDermott 214 Holdings, LLC; names 2 of 2 models: 214B, 214B-1 - [TCDS H2NM](https://openairdocs.org/tcds/H2NM): California Department of Forestry; names 1 of 1 models: UH-1F - [TCDS H3SO](https://openairdocs.org/tcds/H3SO): Richards Heavylift Helo Inc.; names 1 of 4 models: UH-1A - [TCDS H4SW](https://openairdocs.org/tcds/H4SW): Bell Textron Inc.; names 1 of 4 models: 212 ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 496 (496 by airframe model, 0 by engine model) - Makers: Bell 470, Bell Helicopter Textron 6, Northwest Rotorcraft 6, Bell Helicopter 3, Bell/Southwest Florida Aviatio 2, Hawkins & Powers 2, Richards Heavylift Helo 2, Rotorcraft Development 2, Bell-Colonial 1, Bell-Sw Florida Avn 1 Models with the most aircraft: - [Bell UH-1H](https://openairdocs.org/model/bell-uh-1h): 291 aircraft (airframe model) - [Bell 205A-1](https://openairdocs.org/model/bell-205a-1): 56 aircraft (airframe model) - [Bell 212](https://openairdocs.org/model/bell-212): 54 aircraft (airframe model) - [Bell UH-1B](https://openairdocs.org/model/bell-uh-1b): 42 aircraft (airframe model) - [Bell 214B-1](https://openairdocs.org/model/bell-214b-1): 9 aircraft (airframe model) - [Bell 204-B](https://openairdocs.org/model/bell-204-b): 7 aircraft (airframe model) - [Bell UH-1E](https://openairdocs.org/model/bell-uh-1e): 6 aircraft (airframe model) - [Northwest Rotorcraft UH-1H](https://openairdocs.org/model/northwest-rotorcraft-uh-1h): 6 aircraft (airframe model) - [Bell Helicopter Textron 212](https://openairdocs.org/model/bell-helicopter-textron-212): 5 aircraft (airframe model) - [Bell Helicopter UH-1H (205)](https://openairdocs.org/model/bell-helicopter-uh-1h-205): 3 aircraft (airframe model) - [Bell UH-1P](https://openairdocs.org/model/bell-uh-1p): 2 aircraft (airframe model) - [Richards Heavylift Helo UH-1H](https://openairdocs.org/model/richards-heavylift-helo-uh-1h): 2 aircraft (airframe model) - [Bell/Southwest Florida Aviatio 205 A1](https://openairdocs.org/model/bell-southwest-florida-aviatio-205-a1): 2 aircraft (airframe model) - [Bell 214B](https://openairdocs.org/model/bell-214b): 2 aircraft (airframe model) - [Hawkins & Powers UH-1B](https://openairdocs.org/model/hawkins-powers-uh-1b): 2 aircraft (airframe model) - [Rotorcraft Development UH-1H](https://openairdocs.org/model/rotorcraft-development-uh-1h): 2 aircraft (airframe model) - [Bell UH-1L](https://openairdocs.org/model/bell-uh-1l): 1 aircraft (airframe model) - [Bell-Colonial UH-1B](https://openairdocs.org/model/bell-colonial-uh-1b): 1 aircraft (airframe model) - [Bell-Sw Florida Avn UH-1B](https://openairdocs.org/model/bell-sw-florida-avn-uh-1b): 1 aircraft (airframe model) - [Precision Helicopters UH-1H](https://openairdocs.org/model/precision-helicopters-uh-1h): 1 aircraft (airframe model) All 21 models: https://openairdocs.org/ad/80-17-09/models.md Every aircraft: https://openairdocs.org/ad/80-17-09/aircraft.md ## Related documents - [AD 2002-22-14](https://openairdocs.org/ad/2002-22-14): Main rotor tension-torsion (TT) straps ยท Bell Helicopter Textron 204B, 205A, 205A-1 and 4 more. Effective Dec 13, 2002. Supersedes this AD Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.