# AD 73-08-03: Pylon Support Link

- Type: Airworthiness directive
- Status: Current
- Products: Bell Helicopter Textron Canada 206A, 206A-1 (OH-58A), 206B and 206B-1
- Effective: April 18, 1973
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-1622
- Registered aircraft: 861 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B80FCEDC8937819586256A3400537459.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/73-08-03

## The airworthiness directive

73-08-03 BELL: Amdt. 39-1622. Applies to Bell Models 206A, 206B, 206A-1 and 206B-1 helicopters equipped with pylon support links, P/N 206-031-508-5 or -7, certificated in all categories.

Compliance required as indicated.

To prevent possible failure of a pylon support link, P/N 206-031-508-5 or -7 accomplish the following:

  (a) Within the next ten hours time in service after the effective date of this A.D., unless already accomplished, inspect the pylon support link assemblies in accordance with Part II of Bell Helicopter Company Service Bulletin No. 206-01-73-2, Revision A, dated March 27, 1973, or later FAA approved revision or in accordance with an equivalent procedure approved by the Chief, Engineering and Manufacturing Branch, Flight Standards Division, Southwest Region, Federal Aviation Administration. If the bearing inner race measures more than 1.255 inches in diameter or there is any crack in the link, the link assembly must be replaced prior to next flight.

  (b) Within twenty-five hours time in service after compliance with paragraph (a) and thereafter at intervals not to exceed twenty-five hours from the last inspection, inspect the pylon support link assemblies in accordance with Part III of Bell Service Bulletin No. 206-01-73-2, Revision A, dated March 27, 1973, or later FAA approved revision or in accordance with an equivalent procedure approved by the Chief, Engineering and Manufacturing Branch, Flight Standards Division, Southwest Region, Federal Aviation Administration. If any crack is found, the link assembly must be removed and replaced prior to next flight.

  (c) This airworthiness directive is no longer applicable when pylon support links, P/N 206-031-589, are installed.

This supersedes Amendment 39-1602 (38 F.R. 6377), A.D. 73-05-04. This amendment becomes effective April 18, 1973.

## 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: 206B, 206A, 206B-1, 206A-1 (OH-58A)

## 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: 861 (861 by airframe model, 0 by engine model)
- Makers: Bell 822, Bell Helicopter Textron 29, Bell Helicopter Textron Canada 10

Models with the most aircraft:

- [Bell 206B](https://openairdocs.org/model/bell-206b): 790 aircraft (airframe model)
- [Bell Helicopter Textron 206B](https://openairdocs.org/model/bell-helicopter-textron-206b): 29 aircraft (airframe model)
- [Bell 206A](https://openairdocs.org/model/bell-206a): 23 aircraft (airframe model)
- [Bell Helicopter Textron Canada 206B](https://openairdocs.org/model/bell-helicopter-textron-canada-206b): 10 aircraft (airframe model)
- [Bell 206A-1](https://openairdocs.org/model/bell-206a-1): 6 aircraft (airframe model)
- [Bell 206B II](https://openairdocs.org/model/bell-206b-ii): 3 aircraft (airframe model)

All 6 models: https://openairdocs.org/ad/73-08-03/models.md
Every aircraft: https://openairdocs.org/ad/73-08-03/aircraft.md

Its text cites no advisory circulars or STCs.

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