# AD 70-12-11: Flap Actuating System

- Type: Airworthiness directive
- Status: Current
- Products: B-N Group BN-2, BN-2A, BN-2A-2, BN-2A-20, BN-2A-21, BN-2A-26, BN-2A-27, BN-2A-3, BN-2A-6, BN-2A-8, BN-2A-9, BN2A MK. III and 2 more
- Effective: June 11, 1970
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1006
- Registered aircraft: 52 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BDDC36C87F71F4AE86256A450070B67E.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/70-12-11

## The airworthiness directive

70-12-11 BRITTEN-NORMAN, LTD: Amdt. 39-1006. Applies to BN-2 and BN-2A airplanes, serial numbers up to and including S/N C231. Compliance is required within the next 50 hours' time in service after the effective date of this AD, unless already accomplished. To prevent failure of the flap actuating system, replace flap lever drive attachment bolt P/N A111-6G with a serviceable bolt, P/N A111-9G, and replace the flap center operating lever P/N NB-45-D-997 with either - (1) A serviceable flap center operating lever P/N NB-45-D-997 modified and remarked as P/N NB-45-D-2173 (MOD.NB/M/417) in accordance with Britten Norman Modification Leaflet No. BN-2/NB/M/417, Part 2, Issue 1, dated April 8, 1970, or a later ARB- approved issue or an FAA-approved equivalent; or (2) A serviceable flap center operating lever P/N NB-45-D-2173. This amendment becomes effective June 11, 1970.

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A17EU](https://openairdocs.org/tcds/A17EU): Britten-Norman Aerospace Ltd.; names 11 of 18 models: BN-2A-2, BN-2A-9, BN-2A-26, BN-2A-27, BN-2A-3, BN-2A-8, BN-2A-20, BN-2A-21…
- [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: 52 (52 by airframe model, 0 by engine model)
- Makers: Britten-Norman 47, Britten Norman 3, B-N Group 1, Pilatus Britten-Norman 1

Models with the most aircraft:

- [Britten-Norman BN2A-26 ISLANDER](https://openairdocs.org/model/britten-norman-bn2a-26-islander): 14 aircraft (airframe model)
- [Britten-Norman BN-2A](https://openairdocs.org/model/britten-norman-bn-2a): 8 aircraft (airframe model)
- [Britten-Norman BN-2A-8](https://openairdocs.org/model/britten-norman-bn-2a-8): 8 aircraft (airframe model)
- [Britten-Norman BN-2A-27](https://openairdocs.org/model/britten-norman-bn-2a-27): 5 aircraft (airframe model)
- [Britten-Norman BN-2A-9](https://openairdocs.org/model/britten-norman-bn-2a-9): 4 aircraft (airframe model)
- [Britten-Norman BN-2A-20](https://openairdocs.org/model/britten-norman-bn-2a-20): 3 aircraft (airframe model)
- [Britten Norman BN-2A MK III](https://openairdocs.org/model/britten-norman-bn-2a-mk-iii): 2 aircraft (airframe model)
- [Britten-Norman BN-2A-21](https://openairdocs.org/model/britten-norman-bn-2a-21): 2 aircraft (airframe model)
- [Britten-Norman BN-2 ISLANDER](https://openairdocs.org/model/britten-norman-bn-2-islander): 1 aircraft (airframe model)
- [Britten-Norman BN-2A-6](https://openairdocs.org/model/britten-norman-bn-2a-6): 1 aircraft (airframe model)
- [Britten Norman BN 2A MKIII 2](https://openairdocs.org/model/britten-norman-bn-2a-mkiii-2): 1 aircraft (airframe model)
- [B-N Group BN-2A-26](https://openairdocs.org/model/b-n-group-bn-2a-26): 1 aircraft (airframe model)
- [Britten-Norman BN-2A-26](https://openairdocs.org/model/britten-norman-bn-2a-26): 1 aircraft (airframe model)
- [Pilatus Britten-Norman BN-2A-26](https://openairdocs.org/model/pilatus-britten-norman-bn-2a-26): 1 aircraft (airframe model)

All 14 models: https://openairdocs.org/ad/70-12-11/models.md
Every aircraft: https://openairdocs.org/ad/70-12-11/aircraft.md

Its text cites no advisory circulars or STCs.

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