# AD 61-22-01: Pitch Link Rod End Bearing - Type: Airworthiness directive - Status: Current - Products: Scotts-Bell 47 47, 47B, 47B3, 47D, 47D1, 47E, 47G, 47G-2, 47G-2A, 47G-2A-1, 47G-3, 47G-3B and 12 more - Effective: November 7, 1961 - Published: November 7, 1961 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Rotorcraft - Registered aircraft: 490 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FB2EEB723EF4CC9286256A340051AD42.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/61-22-01 ## The airworthiness directive 61-22-01 BELL: Amdt. 361 Part 507 Federal Register November 7, 1961. Applies to All Model 47 Series Helicopters. Compliance required as indicated. To preclude failure of the main rotor pitch link rod end bearing P/N RE4F7 which causes loss of main rotor control, the following one-time only inspection is required to determine that the bearing is correctly installed. (a) Within the next 10 hours' time in service after the effective date of this AD, on all Model 47 Series helicopters, inspect the main rotor control pitch link located between the stabilizer bar mixing lever and the main rotor blade control horn to see that the rod end bearing sides are parallel to the clevis slot. These surfaces must be adjusted parallel to prevent binding of the rod end bearing at extreme ends of travel, as specified in all applicable model maintenance manuals. (b) Within the next 10 hours' time in service after the effective date of this AD, inspect all Models 47D, 47D-1, 47H-1, 47G, 47G-2, and 47J helicopters equipped with Fafnir P/N RE4F7 rod end bearing as follows: (1) Remove the RE4F7 rod end bearing in accordance with the applicable maintenance manual and visually inspect for obvious damage or defect of the outer race such as nicks and gouges adjacent to the shield, looseness, roughness, distortion or kinks in bearing shields. (2) If any damage or defect is found, replace the bearing prior to further flight. (3) If no damage or defect is found, the bearing may be reinstalled. (4) The installation of the bearings under subparagraphs (2) or (3) shall be made in accordance with the applicable maintenance manual making positive that requirements of paragraph (a) are followed. (c) Helicopters listed in paragraph (b) that are not equipped with the Fafnir P/N RE4F7 bearings are equipped with Bell P/N 47-140-241-3 rod end bearings. These bearings are of a different make and only require the inspection called for in paragraph (a).(Bell Service Instruction 345 SI covers this same subject for the models listed under (b)). This directive effective November 7, 1961. ## Affected data sheets (3) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS 2H3](https://openairdocs.org/tcds/2H3): Scott's-Bell 47 Inc; names 11 of 11 models: 47G-2A, 47G-3B, 47G-3, 47G-4A, 47G-5A, 47G-5, 47G-3B-2A, 47G-3B-2… - [TCDS H-1](https://openairdocs.org/tcds/H-1): Scott's-Bell 47 Inc; names 9 of 9 models: 47H-1, 47B, 47B3, 47D1, 47D, 47G-2, 47G, 47… - [TCDS 2H1](https://openairdocs.org/tcds/2H1): Scott's-Bell 47 Inc; names 4 of 4 models: 47K, 47J-2, 47J-2A, 47J ## 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: 490 (490 by airframe model, 0 by engine model) - Makers: Bell 476, Bell-K-Copter 3, Bell Kitz Kopters 1, Bell-Allied Helicopter 1, Bell-Carson 1, Bell-Huddleston And Wilson 1, Bell-Intermountain 1, Bell-Olympic Helicopters 1, Bell-Shippey 1, Bell-Tellijohn 1 Models with the most aircraft: - [Bell 47G-2](https://openairdocs.org/model/bell-47g-2): 87 aircraft (airframe model) - [Bell 47G-3B-1](https://openairdocs.org/model/bell-47g-3b-1): 86 aircraft (airframe model) - [Bell 47G](https://openairdocs.org/model/bell-47g): 55 aircraft (airframe model) - [Bell 47D1](https://openairdocs.org/model/bell-47d1): 47 aircraft (airframe model) - [Bell 47G-5](https://openairdocs.org/model/bell-47g-5): 40 aircraft (airframe model) - [Bell 47G-3B-2](https://openairdocs.org/model/bell-47g-3b-2): 26 aircraft (airframe model) - [Bell 47G-4A](https://openairdocs.org/model/bell-47g-4a): 20 aircraft (airframe model) - [Bell 47G-2A](https://openairdocs.org/model/bell-47g-2a): 19 aircraft (airframe model) - [Bell 47G-5A](https://openairdocs.org/model/bell-47g-5a): 19 aircraft (airframe model) - [Bell 47G-3B](https://openairdocs.org/model/bell-47g-3b): 15 aircraft (airframe model) - [Bell 47G-2A-1](https://openairdocs.org/model/bell-47g-2a-1): 13 aircraft (airframe model) - [Bell 47G-4](https://openairdocs.org/model/bell-47g-4): 13 aircraft (airframe model) - [Bell 47G3B2A](https://openairdocs.org/model/bell-47g3b2a): 7 aircraft (airframe model) - [Bell 47H-1](https://openairdocs.org/model/bell-47h-1): 6 aircraft (airframe model) - [Bell 47J](https://openairdocs.org/model/bell-47j): 6 aircraft (airframe model) - [Bell 47J-2](https://openairdocs.org/model/bell-47j-2): 6 aircraft (airframe model) - [Bell 47J-2A](https://openairdocs.org/model/bell-47j-2a): 5 aircraft (airframe model) - [Bell 47D](https://openairdocs.org/model/bell-47d): 4 aircraft (airframe model) - [Bell-K-Copter 47G](https://openairdocs.org/model/bell-k-copter-47g): 2 aircraft (airframe model) - [Bell 47B](https://openairdocs.org/model/bell-47b): 1 aircraft (airframe model) All 35 models: https://openairdocs.org/ad/61-22-01/models.md Every aircraft: https://openairdocs.org/ad/61-22-01/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.