# AD 77-03-05: Main Landing Gear - Type: Airworthiness directive - Status: Current - Products: Textron 19A, 23, A23, A23-19, A23-24, A23A, A24, B19, B23, C23 and M19A - Effective: March 14, 1977 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-2827 - Registered aircraft: 1,183 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C3F72229DA1A633886256A0800727EAC.0001 - DRS record last changed: January 21, 2026 - Page: https://openairdocs.org/ad/77-03-05 ## The airworthiness directive 77-03-05 BEECH: Amendment 39-2827. Applies to Models A23-19, 19A, M19A and B19 (Serial Numbers MB-1 through MB-536); Models 23, A23, A23A, B23 and C23 (Serial Numbers M-2 through M-1392); and Models A23-24 and A24 (Serial Numbers MA-1 through MA-368) airplanes certificated in all categories. Compliance: Required as indicated unless already accomplished. To prevent possible collapse during landing or in-flight separation of the main landing gear, accomplish the following in accordance with Beech Service Instructions No. 0465-202, Rev. I or later FAA approved Revisions: A. Within the next 150 hours' time in service after the effective date of this AD for those aircraft on 100 hour (FAR 91.169(b)) inspections, progressive (FAR 91.171) inspections or approved aircraft inspection program (FAR 135.60) or within eighteen (18) months after the effective date of this AD for those aircraft on annual (FAR 91.169(a)) inspections: 1. Remove left and right main landing gearhousing (male part) from wing strut adapter (female part). 2. Using dye penetrant procedures, inspect the main landing gear housings (male part), in the areas around the fore and aft retention bolt hole for cracks. 3. If no cracks are found as a result of the inspection required in paragraph A.2.: a. Reinstall the main gear housings in accordance with Beech Service Instruction 0465-202, Revision I or later FAA approved revisions. b. Do not install any bolt in the fore and aft retention bolt hole. 4. If cracks are found during inspection required in paragraph A.2. above, prior to further flight: a. Replace any cracked main gear housing with a new Beech Part No. 169-810011-25 housing assembly in accordance with Beech Service Instructions 0465-202, Revision I or later FAA approved revisions. b. Do not install any bolt in the fore and aft retention bolt hole. NOTE. Even through Beech Service Instruction 0465-202, Rev. I refers to P/N 169- 810011-21 housing, Beech will ship a P/N 169-810011-25 housing assembly. The P/N 169- 810011-25 assembly consists of two bushings installed in a P/N 169-810011-21 housing. B. Any equivalent means of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region. This amendment becomes effective March 14, 1977. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A1CE](https://openairdocs.org/tcds/A1CE): Textron Aviation Inc.; names 11 of 14 models: A23-24, M19A, A24, A23, A23-19, B23, B19, 23… ## 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: 1,183 (1,183 by airframe model, 0 by engine model) - Makers: Beech 1,183 Models with the most aircraft: - [Beech C23](https://openairdocs.org/model/beech-c23): 456 aircraft (airframe model) - [Beech 23](https://openairdocs.org/model/beech-23): 147 aircraft (airframe model) - [Beech B19](https://openairdocs.org/model/beech-b19): 145 aircraft (airframe model) - [Beech A23-24](https://openairdocs.org/model/beech-a23-24): 121 aircraft (airframe model) - [Beech A23](https://openairdocs.org/model/beech-a23): 85 aircraft (airframe model) - [Beech A23-19](https://openairdocs.org/model/beech-a23-19): 72 aircraft (airframe model) - [Beech B23](https://openairdocs.org/model/beech-b23): 62 aircraft (airframe model) - [Beech A23A](https://openairdocs.org/model/beech-a23a): 51 aircraft (airframe model) - [Beech 19A](https://openairdocs.org/model/beech-19a): 41 aircraft (airframe model) - [Beech B-19 SPORT](https://openairdocs.org/model/beech-b-19-sport): 2 aircraft (airframe model) - [Beech C 23](https://openairdocs.org/model/beech-c-23): 1 aircraft (airframe model) All 11 models: https://openairdocs.org/ad/77-03-05/models.md Every aircraft: https://openairdocs.org/ad/77-03-05/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.