# AD 78-11-08: Elevator and Flap Control Rods - Type: Airworthiness directive - Status: Current - Products: B-N Group 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, BN2A MK. III-2 and 1 more - Effective: June 6, 1978 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-3219 - Registered aircraft: 51 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BA721174F23E2F3D86256A34005C8F9A.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/78-11-08 ## The airworthiness directive 78-11-08 BRITTEN NORMAN: Amendment 39-3219. Applies to Models BN-2A Islander and BN-2A Mark III Trislander series airplanes, certificated in all categories, that have not been modified in accordance with Britten-Norman Modification NB/M/929. Compliance required as indicated, unless already accomplished. To detect and prevent electrolytic corrosion of the elevator and flap control rods, accomplish the following in accordance with Britten-Norman Service Bulletin No. BN-2/SB.101, Issue 2, dated August 10, 1977, or an FAA-approved equivalent: (a) Within the next 2 weeks after the effective date of this AD, and thereafter at intervals not to exceed 6 months, inspect the elevator and flap control rods at bonding clip attachment points for electrolytic corrosion. (b) If during an inspection required by paragraph (a) of this AD corrosion is found, before further flight - (1) Replace the control rod with a part of the same part number; or (2) Clean the partuntil the metal is free of corrosion. However, if the metal cleaned from the control rod reduces the rod diameter in excess of 0.010 in., replace the control rod with a part of the same part number. (c) The inspections required by this AD may be discontinued upon the replacement of the installed elevator and flap control rod untreated bonding clips with light alloy or cadmium coated clips in accordance with Britten-Norman Modification No. NB/M/929 or an FAA-approved equivalent. (d) Airplanes may be flown in accordance with the requirements of FAR 21.197 and 21.199 to a base where the inspections and repairs required by this AD may be performed. This amendment becomes effective June 6, 1978. ## 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 10 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: 51 (51 by airframe model, 0 by engine model) - Makers: Britten-Norman 46, 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-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 13 models: https://openairdocs.org/ad/78-11-08/models.md Every aircraft: https://openairdocs.org/ad/78-11-08/aircraft.md Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.