# AD 90-13-01 R1: Tail Rotor Blade Assembly - Type: Airworthiness directive - Status: Current - Products: Bell Helicopter Textron Canada 206B, 206L, 206L-1 and 206L-3 - Effective: October 17, 1991 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Rotorcraft - Amendment: 39-8034 - Docket: 90-ASW-35 - Registered aircraft: 1,151 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4C881D18F5F8A32A86256A4D0071B26C.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/90-13-01-R1 ## The airworthiness directive 90-13-01 R1 BELL HELICOPTER TEXTRON, INC. (BHTI): Amendment 39-8034. Docket No. 90-ASW-35. Final rule of priority letter AD. Applicability: Model 206B, 206L, 206L-1, and 206L-3 helicopters, all serial numbers, certificated in any category. Compliance: Required before further flight, unless already accomplished. To prevent failure of a tail rotor blade assembly, which could result in loss of control of the tail rotor, accomplish the following: (a) Determine the part number and serial number of the tail rotor blade assembly installed on the helicopter. (b) If the tail rotor blade assembly installed is P/N 206-016-201-113 or P/N 206- 016-201-127 and is identified with any serial number listed below, remove and replace the blade assembly with an airworthy part before further flight: T-41361 T-41627 T-41725 T-41737 T-42088 T-42127 T-42157 T-42307 T-42311 T-42316 T-42494 T-42496 T-42497 T-42502 T-42523 T-42534 T-43276 T-44089 T-44120 T-44157 T-44174 Serial Numbers: T-44222 T-44300 T-44638 (c) If one of the tail rotor blade assemblies listed in paragraph (b) is found, report the helicopter registration, serial number, and tail rotor blade assembly serial number to the Manager, Rotorcraft Certification Office, ASW-170, Federal Aviation Administration, Fort Worth, Texas, 76193-0170, telephone (817) 624-5170, within 10 days of the inspection. (Reporting approved by the Office of Management and Budget under OMB No. 2120-0056.) (d) In accordance with FAR Sections 21.197 and 21.199, the helicopter may be flown to a base where the tail rotor blade assembly replacement may be accomplished. NOTE: Any unairworthy blade assemblies found as a result of (b) of this AD should be permanently marked as unairworthy. (e) Record compliance with paragraph (b) of this AD in the AD compliance record and in the maintenance record of the helicopter log book. This record must include the serial numbers of any deficient blade assembly found during compliance with this AD. (f) An alternate method of compliance which provides an equivalent level of safety, may be used if approved by the Manager, Rotorcraft Certification Office, Southwest Region, Federal Aviation Administration, Fort Worth, Texas 76193-0170, telephone (817) 624-5170. This amendment (39-8034, AD 90-13-01 R1) becomes effective on October 17, 1991, as to all persons except those persons to whom it was made immediately effective by Priority Letter AD's 90-13-01 and 90-13-01 R1, issued June 14 and June 22, 1990, which contained this amendment. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS H2SW](https://openairdocs.org/tcds/H2SW): Bell Textron Canada Limited; names 4 of 12 models: 206L, 206B, 206L-1, 206L-3 ## 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: 1,151 (1,151 by airframe model, 0 by engine model) - Makers: Bell 959, Bell Helicopter Textron 178, Bell Helicopter Textron Canada 14 Models with the most aircraft: - [Bell 206B](https://openairdocs.org/model/bell-206b): 791 aircraft (airframe model) - [Bell 206L-3](https://openairdocs.org/model/bell-206l-3): 159 aircraft (airframe model) - [Bell Helicopter Textron 206L-1](https://openairdocs.org/model/bell-helicopter-textron-206l-1): 149 aircraft (airframe model) - [Bell Helicopter Textron 206B](https://openairdocs.org/model/bell-helicopter-textron-206b): 29 aircraft (airframe model) - [Bell Helicopter Textron Canada 206B](https://openairdocs.org/model/bell-helicopter-textron-canada-206b): 10 aircraft (airframe model) - [Bell 206L](https://openairdocs.org/model/bell-206l): 6 aircraft (airframe model) - [Bell Helicopter Textron Canada 206L-3](https://openairdocs.org/model/bell-helicopter-textron-canada-206l-3): 4 aircraft (airframe model) - [Bell 206B II](https://openairdocs.org/model/bell-206b-ii): 3 aircraft (airframe model) All 8 models: https://openairdocs.org/ad/90-13-01-R1/models.md Every aircraft: https://openairdocs.org/ad/90-13-01-R1/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.