# AD 89-25-04: Tail Rotor Support Bracket Bulkhead

- Type: Airworthiness directive
- Status: Current
- Products: Bell Helicopter Textron, A Division of Textron Canada 222 and 222B
- Effective: December 20, 1989
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-6380
- Docket: 89-ASW-39
- Registered aircraft: 18 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/578B0CACA84944CA86256A4E004E2C90.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/89-25-04

## The airworthiness directive

89-25-04 BELL HELICOPTER TEXTRON, INC.: Amendment 39-6380. Docket No. 89-ASW-39.

Applicability: Model 222 helicopters, serial numbers (S/N) 47006 through 47079 and 47081 through 47084, and Model 222B helicopter, S/N 47132. This AD applies to these helicopters, certificated in any category, with tail rotor boost cylinder support bracket, part number (P/N) 222-031-471-001, installed.

Compliance: Required within 50 hours' time in service after the effective date of this AD, unless already accomplished.

To prevent failure of the tail rotor boost cylinder support bracket bulkhead, which could result in loss of the helicopter, accomplish the following:

  (a) Modify the Station 340 bulkhead in accordance with Appendix I of this AD. (Note: Appendix I refers to Bell Helicopter Textron Alert Service Bulletin No. 222-89-55, dated August 24, 1989, which is not reprinted in this AD.)

  (b) Compliance with BHTI Technical Bulletin No. 222-83-55, dated April 25, 1983, orPart II of Alert Service Bulletin No. 222-89-55, dated August 24, 1989, constitutes compliance with this AD.

  (c) An alternate method of compliance which provides an equivalent level of safety, may be approved by the Manager, Rotorcraft Certification Office, Southwest Region, Federal Aviation Administration, Fort Worth, Texas 76193-0170.

This amendment (39-6380, AD 89-25-04) becomes effective on December 20, 1989.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS H9SW](https://openairdocs.org/tcds/H9SW): Bell Textron Canada Limited; names 2 of 5 models: 222B, 222

## 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: 18 (18 by airframe model, 0 by engine model)
- Makers: Bell 18

Models with the most aircraft:

- [Bell 222](https://openairdocs.org/model/bell-222): 15 aircraft (airframe model)
- [Bell 222B](https://openairdocs.org/model/bell-222b): 3 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/89-25-04/models.md
Every aircraft: https://openairdocs.org/ad/89-25-04/aircraft.md

Its text cites no advisory circulars or STCs.

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