# AD 70-14-06: Fire Wall To Compressor Seal

- Type: Airworthiness directive
- Status: Current
- Products: Bell Helicopter Textron Canada 206A
- Effective: August 16, 1970
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-1029
- Registered aircraft: 23 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/243A25CBD425759486256A340052CE9D.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/70-14-06

## The airworthiness directive

70-14-06 BELL: Amendment 39-1029. Applies to Model 206A Helicopters, S/N 4 thru 448, 460 thru 464, 467, 469 thru 473 and 475 thru 477, certificated in all categories.

Compliance required not later than 300 hours time in service after the effective date of this Airworthiness Directive, unless already accomplished.

To relieve engine compressor flange loads, replace existing fire-wall-to-compressor seal with a new improved firewall seal kit, Bell Part No. 206-704-026-1, in accordance with applicable paragraphs of Bell Service Letter 206A-142, dated November 5, 1969, or later FAA approved revision. Equivalent methods of compliance must be approved by the Chief, Engineering and Manufacturing Branch, Flight Standards Division, Southwest Region, Federal Aviation Administration.

This amendment becomes effective August 16, 1970.

## 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: 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: 23 (23 by airframe model, 0 by engine model)
- Makers: Bell 23

Models with the most aircraft:

- [Bell 206A](https://openairdocs.org/model/bell-206a): 23 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/70-14-06/models.md
Every aircraft: https://openairdocs.org/ad/70-14-06/aircraft.md

Its text cites no advisory circulars or STCs.

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