# AD 79-21-03: Elevator Trim Tab Cable

- Type: Airworthiness directive
- Status: Current
- Products: B-N Group BN2A MK. III, BN2A MK. III-2 and BN2A MK. III-3
- Effective: November 12, 1979
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-3588
- Registered aircraft: 3 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CCC17C885DC8913D86256A34005C942C.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/79-21-03

## The airworthiness directive

79-21-03 BRITTEN-NORMAN (Bembridge) LTD.: Amendment 39-3588. Applies to BN-2A Mk III Series Trislander airplanes, certificated in all categories, which do not incorporate Britten-Norman modification NB/M/679.

Compliance is required prior to the accumulation of 1000 hours time in service or within 200 hours time in service after the effective date of this AD, whichever occurs later, unless already accomplished.

To prevent failure of the elevator trim tab cable and the possible resultant trim tab flutter, replace the existing elevator trim tab cables, P/Ns NB-45-B-2333, 2231, 2229 with new cables P/Ns NB-45-B-2747, 2749, 2745, respectively, in accordance with Britten-Norman Service Bulletin BN-2/SB.75, dated June 27, 1974, or an equivalent approved by the Chief, Aircraft Certification Staff, AEU-100, Federal Aviation Administration, c/o American Embassy, Brussels, Belgium.

This amendment becomes effective November 12, 1979.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A29EU](https://openairdocs.org/tcds/A29EU): Britten-Norman Aerospace Ltd.; names 3 of 3 models: BN2A MK. III, BN2A MK. III-2, BN2A MK. III-3

## 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: 3 (3 by airframe model, 0 by engine model)
- Makers: Britten Norman 3

Models with the most aircraft:

- [Britten Norman BN-2A MK III](https://openairdocs.org/model/britten-norman-bn-2a-mk-iii): 2 aircraft (airframe model)
- [Britten Norman BN 2A MKIII 2](https://openairdocs.org/model/britten-norman-bn-2a-mkiii-2): 1 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/79-21-03/models.md
Every aircraft: https://openairdocs.org/ad/79-21-03/aircraft.md

Its text cites no advisory circulars or STCs.

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