# AD 88-25-05: Tail Rotor Grip Assembly - Type: Airworthiness directive - Status: Current - Products: AST UH-1F, 204B, 205A, 205A-1, TH-1L, UH-1E, UH-1L, UH-1F, UH-1B, TH-1L, UH-1B, UH-1E and 16 more - Effective: December 13, 1988 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Rotorcraft - Amendment: 39-6079 - Registered aircraft: 124 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CD913DAA43E342FB86256A4D0073D98A.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/88-25-05 ## The airworthiness directive 88-25-05 BELL HELICOPTER TEXTRON, INC. (BHTI); CALIFORNIA DEPARTMENT OF FORESTRY; GARLICK HELICOPTERS; HAWKINS AND POWERS AVIATION, INC.; INTERNATIONAL HELICOPTERS, INC.; PILOT PERSONNEL INTERNATIONAL, INC.; SMITH HELICOPTERS; SOUTHERN AERO CORPORATION; OREGON HELICOPTERS; WEST COAST FABRICATIONS; and HERCULES: Amendment 39-6079. Applies to Model 204B, 205A, and 205A-1 helicopters certificated in any category and Model UH-1B, UH-1E, UH-1F, UH-1L, and TH-1L helicopters certificated in the restricted category that have tail rotor grip assembly P/N 204-011-728-1, -13, or -19 installed. Compliance is required as indicated, unless already accomplished. To prevent failure of the tail rotor (T/R) grip assembly, accomplish the following: (a) Within the next 50 hours' time in service after the effective date of this AD, remove the T/R grip assembly, P/N 204-011-728-1, -13, or -19 with 250 or more hours' time in service and replace with a serviceable part. (b) For those T/R grip assemblies, P/N 204-011-728-1, -13 or -19, with less than 250 hours' time in service on the effective date of this AD, a retirement life of 300 hours is established. (c) Any alternate method of compliance which provides an equivalent level of safety with this AD may be used when approved by the Manager, Helicopter Certification Branch, Federal Aviation Administration, Fort Worth, Texas 76193-0170. This amendment (39-6079, AD 88-25-05) becomes effective December 13, 1988. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS H1SW](https://openairdocs.org/tcds/H1SW): Bell Textron Inc.; names 3 of 5 models: 205A, 204B, 205A-1 ## 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: 124 (124 by airframe model, 0 by engine model) - Makers: Bell 115, Bell/Southwest Florida Aviatio 2, Hawkins & Powers 2, Bell Helicopter Textron 1, Bell-Colonial 1, Bell-Sw Florida Avn 1, Williams Helicopter 1, Williams Helicopter Corp/Oas 1 Models with the most aircraft: - [Bell 205A-1](https://openairdocs.org/model/bell-205a-1): 56 aircraft (airframe model) - [Bell UH-1B](https://openairdocs.org/model/bell-uh-1b): 42 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) - [Bell UH-1F](https://openairdocs.org/model/bell-uh-1f): 3 aircraft (airframe model) - [Bell/Southwest Florida Aviatio 205 A1](https://openairdocs.org/model/bell-southwest-florida-aviatio-205-a1): 2 aircraft (airframe model) - [Hawkins & Powers UH-1B](https://openairdocs.org/model/hawkins-powers-uh-1b): 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) - [Bell Helicopter Textron 205A-1](https://openairdocs.org/model/bell-helicopter-textron-205a-1): 1 aircraft (airframe model) - [Williams Helicopter UH-1B](https://openairdocs.org/model/williams-helicopter-uh-1b): 1 aircraft (airframe model) - [Williams Helicopter Corp/Oas UH-1E](https://openairdocs.org/model/williams-helicopter-corp-oas-uh-1e): 1 aircraft (airframe model) All 13 models: https://openairdocs.org/ad/88-25-05/models.md Every aircraft: https://openairdocs.org/ad/88-25-05/aircraft.md 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.