# AD 84-25-02: Trim Tab Brackets - Type: Airworthiness directive - Status: Current - Products: Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15, MU-2B-20, MU-2B-25, MU-2B-26, MU-2B-26A, MU-2B-30, MU-2B-35, MU-2B-36, MU-2B-36A, MU-2B-40 and 1 more - Effective: December 18, 1984 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-4962 - Registered aircraft: 177 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D87F5FBC7840E37686256A4D0049C527.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/84-25-02 ## The airworthiness directive 84-25-02 MITSUBISHI: Amendment 39-4962. Applies to Models MU-2B, -10, -15, - 20, -25, -26, -26A, -30, -35, -36, -36A, -40, and -60 (Serial Numbers 1 up to and including 799, and 1501 up to and including 1530 with or without the SA suffix), airplanes certificated in any category. NOTE: The serial numbers of airplanes manufactured in the United States by Mitsubishi Aircraft International, Inc. (MAI) are suffixed by "SA." The serial numbers of airplanes manufactured in Japan by Mitsubishi Heavy Industries, Ltd. (MHI) have no suffix. Compliance: Required as indicated, unless already accomplished. To prevent failure of the elevator trim tab brackets bushing, accomplish the following: (a) Within the next 100 hours time-in-service, replace Part Number (P/N) 010A- 22117, P/N 010A-22119, P/N 010A-22127 or P/N 035A-22127 trim tab brackets with P/N 035A- 22128-1/-2 trim tab brackets on MAI airplanes in accordance with Parts 3 and 4 of MAI Service Bulletin (SB) 031/27-005, Revision 1, dated October 15, 1984, and on MHI airplanes in accordance with paragraphs A. or B., as appropriate, of MHI SB No. 176, Revision E, dated September 26, 1984. (b) Airplanes may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished. (c) An equivalent method of compliance with this AD may be used on the MHI airplanes, if approved by the Manager, Western Aircraft Certification Office, ANM-170W, Federal Aviation Administration, P.O. Box 92007, Worldway Postal Center, Los Angeles, California 90009, telephone (213) 536-6351, and on the MAI airplanes, if approved by the Manager, Airplane Certification Branch, ASW-150, Federal Aviation Administration, Southwest Region, P.O. Box 1689, Fort Worth, Texas 76101, telephone (817) 877-2100. This AD supersedes AD 77-13-19, Amendment 39-2941 and AD 77-04-07, Rev. 1, Amendment 39-4181. This amendment becomes effective on December 18, 1984. ## Affected data sheets (2) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A2PC](https://openairdocs.org/tcds/A2PC): Mitsubishi Heavy Industries Ltd. 203; names 5 of 7 models: MU-2B, MU-2B-30, MU-2B-20, MU-2B-35, MU-2B-36 - [TCDS A10SW](https://openairdocs.org/tcds/A10SW): Mitsubishi Heavy Industries Ltd.; names 4 of 6 models: MU-2B-26A, MU-2B-36A, MU-2B-60, MU-2B-40 ## 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: 177 (177 by airframe model, 0 by engine model) - Makers: Mitsubishi 177 Models with the most aircraft: - [Mitsubishi MU-2B-60](https://openairdocs.org/model/mitsubishi-mu-2b-60): 50 aircraft (airframe model) - [Mitsubishi MU-2B-40](https://openairdocs.org/model/mitsubishi-mu-2b-40): 35 aircraft (airframe model) - [Mitsubishi MU-2B-25](https://openairdocs.org/model/mitsubishi-mu-2b-25): 23 aircraft (airframe model) - [Mitsubishi MU-2B-26A](https://openairdocs.org/model/mitsubishi-mu-2b-26a): 19 aircraft (airframe model) - [Mitsubishi MU-2B-26](https://openairdocs.org/model/mitsubishi-mu-2b-26): 16 aircraft (airframe model) - [Mitsubishi MU-2B-20](https://openairdocs.org/model/mitsubishi-mu-2b-20): 12 aircraft (airframe model) - [Mitsubishi MU-2B-36A](https://openairdocs.org/model/mitsubishi-mu-2b-36a): 10 aircraft (airframe model) - [Mitsubishi MU-2B-36](https://openairdocs.org/model/mitsubishi-mu-2b-36): 7 aircraft (airframe model) - [Mitsubishi MU-2B-35](https://openairdocs.org/model/mitsubishi-mu-2b-35): 4 aircraft (airframe model) - [Mitsubishi MU-2B](https://openairdocs.org/model/mitsubishi-mu-2b): 1 aircraft (airframe model) All 10 models: https://openairdocs.org/ad/84-25-02/models.md Every aircraft: https://openairdocs.org/ad/84-25-02/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.