# AD 76-05-01: Inboard Ribs

- Type: Airworthiness directive
- Status: Current
- Products: Bell Helicopter Textron Canada 206B
- Effective: April 5, 1976
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-2530
- Registered aircraft: 832 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A975EEADE6EE599F86256A340054846B.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/76-05-01

## The airworthiness directive

76-05-01 BELL: Amendment 39-2530. Applies to Bell Model 206B helicopters, serial numbers 914 through 1413, certificated in all categories.

Compliance required within 200 hours' time in service after the effective date of this AD, unless already accomplished.

To prevent possible failure of the inboard ribs on the horizontal stabilizers, P/N 206-020- 119 and 206-020-123, 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 D, dated August 5, 1974, or later FAA approved revision.

Equivalent methods of compliance with this airworthiness directive may be approved by the Chief, Engineering and Manufacturing Branch, Flight Standards Division, Southwest Region, Federal Aviation Administration.

Exemptions issued for Amdt. 39-1954, AD 74-19-03, are approved equivalent means of compliance withthis airworthiness directive.

The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to the Service Manager, Bell Helicopter Company, P. O. Box 482, Fort Worth, Texas 76101. These documents may also be examined at the Office of the Regional Counsel, Southwest Region, FAA, 4400 Blue Mound Road, Fort Worth, Texas, and at FAA Headquarters, 800 Independence Avenue, S.W., Washington, D.C. A historical file on this AD which includes the incorporated material in full is maintained by the FAA at its headquarters in Washington, D.C., and at the Southwest Regional Office in Fort Worth, Texas.

This amendment becomes effective April 5, 1976.

## 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 1 of 12 models: 206B

## 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: 832 (832 by airframe model, 0 by engine model)
- Makers: Bell 793, 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 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 4 models: https://openairdocs.org/ad/76-05-01/models.md
Every aircraft: https://openairdocs.org/ad/76-05-01/aircraft.md

Its text cites no advisory circulars or STCs.

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