# AD 74-19-03: Horizontal Stabilizer Ribs

- Type: Airworthiness directive
- Status: Current
- Products: Bell Helicopter Textron Canada 206A and 206B
- Effective: October 13, 1974
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-1954
- Registered aircraft: 855 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7BA10CBDCA1A712986256A340053E2D4.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/74-19-03

## The airworthiness directive

74-19-03 BELL: Amendment 39-1954. Applies to Bell Model 206A and 206B helicopters as noted herein, certificated in all categories.

Compliance required within 100 hours time in service after the effective date of this A.D., unless already accomplished.

To prevent possible failure of the inboard ribs with possible loss of a stabilizer on Model 206A and 206B helicopters, serial numbers 1 through 913 equipped with horizontal stabilizer, P/N 206-020-119, replace any cracked inboard ribs and modify all inboard ribs by installing a doubler specified in and using the applicable procedures described in Items 3 through 24, Bell Helicopter Company Service Bulletin No. 206-01-73-7, Revision A, dated December 11, 1973 or later FAA approved revision.

To prevent excessive movement of the horizontal stabilizer install Horizontal Stabilizer Stop Kit, P/N 206-704-096-3, on Model 206A and 206B helicopters, Serial Numbers 1 through 1251, in accordance with Bell Helicopter Company Service Bulletin No. 206-01-74-1, Revision A, dated May 6, 1974, or later FAA approved revision.

This amendment becomes effective October 13, 1974.

## 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 2 of 12 models: 206B, 206A

## 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: 855 (855 by airframe model, 0 by engine model)
- Makers: Bell 816, 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 206B II](https://openairdocs.org/model/bell-206b-ii): 3 aircraft (airframe model)

All 5 models: https://openairdocs.org/ad/74-19-03/models.md
Every aircraft: https://openairdocs.org/ad/74-19-03/aircraft.md

Its text cites no advisory circulars or STCs.

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