# AD 70-07-05: Carburetor Air Box

- 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: March 31, 1970
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-965
- Registered aircraft: 52 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7300177AC24AF23986256A450070B0EB.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/70-07-05

## The airworthiness directive

70-07-05 BRITTEN-NORMAN, LTD: Amdt. 39-965. Applies to Models BN-2 and BN-2A airplanes. To prevent possible engine fires due to accumulation of fuel in the rear of the carburetor air box and hot air ducting, within the next 25 hours' time in service after the effective date of this AD, unless already accomplished, install drain holes in each carburetor air box and in each engine cowling in accordance with Britten-Norman Service Bulletin No. BN-2/SB.28, dated February 12, 1970, or later ARB-approved issue, or an FAA-approved equivalent. This amendment becomes effective March 31, 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/70-07-05/models.md
Every aircraft: https://openairdocs.org/ad/70-07-05/aircraft.md

Its text cites no advisory circulars or STCs.

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