# AD 83-10-06 R1: Elevator Trim Tabs - 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BN-2A-21, BN-2A-26, BN-2A-27, BN-2A-3, BN-2A-6, BN-2A-8, BN-2A-9, BN-2B-20 and 6 more - Effective: February 12, 1987 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-5507 - Registered aircraft: 71 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6A7BD4332C092B4986256A4D00491866.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/83-10-06-R1 ## The airworthiness directive 83-10-06 R1 PILATUS BRITTEN-NORMAN LTD: Amendment 39-4656 as amended by Amendment 39-5507. Applies to Models BN-2, BN-2A and BN-2B Islander Series (all serial numbers) airplanes certificated in any category. Compliance: Required as indicated, unless already accomplished. To prevent structural failure of the elevator trim tabs, accomplish the following: a) For those airplanes not incorporating Mod NB/M/1117, within the next 10 hours time-in-service after the effective date of this AD or within 10 hours time-in-service from the last inspection per AD 83-07-03 and thereafter at intervals not to exceed 10 hours time-in-service: 1) Visually inspect, using a 5x power magnifying glass, the elevator trim tab skins, front channel member (spar) and drive ribs for cracks in accordance with the instructions contained in the "inspection" section of Pilatus Britten-Norman Ltd., Service Bulletin (S/B) No. BN-2/SB.142, Issue 4, dated January 22, 1986 (hereinafter referred to as the S/B), or an FAA-approved equivalent. 2) Visually inspect elevator trim tabs for loose or broken rivets. 3) Visually inspect elevator trim tab hinges for damage or excessive wear. 4) Visually inspect the trim tab operating system for backlash in accordance with the instructions provided in the "Inspection" section of the SB. 5) Before further flight, repair any defects found during accomplishment of paragraphs a)1), a)2), a)3), or a)4) of this AD, in accordance with the instructions contained in the "Rectification (Pre-Mod NB/M/1117 Long Span Tabs)" section of the SB and/or instructions provided by Pilatus Britten-Norman, Ltd., Bembridger, Isle of Wight, England, and approved by the Manager, Aircraft Certification Staff, AEU-100, Europe, Africa and Middle East Office, FAA, c/o American Embassy, Brussels, Belgium. 6) The actions required by paragraphs a)1) through a)4) of this AD may be performed by the pilot, providing: i) The pilot's logbook has been endorsed by a properly rated mechanic stating that the pilot has been trained to conduct these inspections in accordance with this AD, and ii) These inspections are performed at least once each 100 hours time-in-service by a properly rated mechanic. b) For those airplanes which have incorporated Mod. NB/M/1117, the intervals between repetitive inspections specified in paragraph a) of this AD may be increased to 100 hours time-in-service (as prescribed in the Airplane Maintenance Schedules (Pub. Ref. MS/1 and MS/4), and with the instructions in the Airplane Maintenance Manual (Pub. Ref. MM/1)). c) Any airplane which incorporates a Collins AP107 Autopilot (Mod NB/M/911) is not eligible for incorporation of Mod NB/M/1117 unless the autopilot system has been modified to conform with Appendix 6 (Issue II or later) of Mod NB/M/911 in accordance with SB No. BN- 2/SB156, dated March 14, 1983. d) The intervals between the repetitive inspections required by this AD may be adjusted up to 10 percent of the specified interval to allow accomplishing these inspections concurrent with other scheduled maintenance of the airplane. e) Aircraft may be flown in accordance with FAR 21.197 to a location where this AD can be accomplished. An equivalent means of compliance with this AD may be used if approved by the Manager, Aircraft Certification Staff, AEU-100, Europe, Africa, and Middle East Office, FAA, c/o American Embassy, B-1000 Brussels, Belgium. All persons affected by this directive may obtain copies of the document referred to herein upon request to Pilatus Britten-Norman Ltd., Bembridge, Isle of Wight, England; or FAA, Office of the Regional Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106. Amendment 39-4656 superseded AD 83-07-03, Amendment 39-4602. Amendment 39- 4656 became effective on June 2, 1983. This amendment, 39-5507, becomes effective on February 12, 1987. ## 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 15 of 18 models: BN-2A-2, BN-2A-9, BN-2B-20, BN-2A-26, BN-2B-26, BN-2A-27, BN-2A-3, BN-2A-8… - [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: 71 (71 by airframe model, 0 by engine model) - Makers: Britten-Norman 52, Pilatus Britten-Norman 13, Britten Norman 5, B-N Group 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) - [Pilatus Britten-Norman BN2B-20](https://openairdocs.org/model/pilatus-britten-norman-bn2b-20): 6 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-2B-26](https://openairdocs.org/model/britten-norman-bn-2b-26): 4 aircraft (airframe model) - [Pilatus Britten-Norman BN-2B-21](https://openairdocs.org/model/pilatus-britten-norman-bn-2b-21): 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-2B-20](https://openairdocs.org/model/britten-norman-bn-2b-20): 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-2B-21](https://openairdocs.org/model/britten-norman-bn-2b-21): 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-2B-27](https://openairdocs.org/model/pilatus-britten-norman-bn-2b-27): 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 21 models: https://openairdocs.org/ad/83-10-06-R1/models.md Every aircraft: https://openairdocs.org/ad/83-10-06-R1/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.