# AD 73-20-07 R2: Wing Attach Bolts/Brackets - Type: Airworthiness directive - Status: Current - Products: Textron 19A, 23, A23, A23-19, A23-24, A23A, A24, A24R, B19, B23, B24R, C23 and 1 more - Effective: September 3, 1982 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-4461 - Registered aircraft: 1,349 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A717F1BC85BCBC0B86256A080071CB20.0001 - DRS record last changed: January 21, 2026 - Page: https://openairdocs.org/ad/73-20-07-R2 ## The airworthiness directive 73-20-07 R2 BEECH: Amendment 39-1728 as amended by Amendment 39-3732 is further amended by Amendment 39-4461. Applies to Models A23-19, 19A, M19A, B-19 (Serial Numbers MB-1 through MB-708); Models 23, A23, A23A, B23, C23 (Serial Numbers M-1 through M-1576); Models A23-24, A24 (Serial Numbers MA-1 through MA-368); and Models A24R, B24R (Serial Numbers MC-2 through MC-282) certified in all categories. Compliance: Required as indicated. To detect cracks or other structural damage to the forward wing attach point brackets (P/N 169-400013-3 and -5(LH) and 169-400013-4 and -6 (RH)), within the next 25 hours' time in service after the effective date of this AD unless previously accomplished on airplanes having more than 100 hours' time in service and thereafter at each normal annual, progressive or 100 hour inspection interval as required by FAR 91.169, accomplish the following: (a) Remove the seats and sidepanels and visually inspect the forward wing attach brackets, P/N169-400013-3 and -5 (LH) and 169-400013-4 and -6 (RH), to determine if cracks or other structural damage exists in the area around the attach bolt hole. This inspection is to be performed in accordance with Beech Service Instructions 0042-031, Rev. II. (b) If as a result of any inspection required herein cracks or other structural damage is discovered, prior to further flight repair the forward wing attach brackets in accordance with Beechcraft Service Instructions 0042-031, or later FAA-approved revisions, or any other repair approved by the Chief, Wichita Aircraft Certification Office, FAA, Wichita, Kansas. To accomplish the repair required herein the aircraft may be flown in accordance with FAR 21.197 to a base where the repair may be performed. (c) The inspection intervals required in this AD may be adjusted 15 plus or minus hours where required to fit users maintenance cycles if authorized by an FAA Flight Standards Inspector. (d) When airplanes have been modified by installing all of the new wing attach structural parts listed under materials in Beechcraft Service Instructions No. 0042-031, Rev. II, further compliance with this AD is not required. (e) Any equivalent method of compliance with this AD must be approved by the Chief, Wichita Aircraft Certification Office, Federal Aviation Administration, Room 238, Terminal Building No. 2299, Mid-Continent Airport, Wichita, Kansas 67209. Amendment 39-1728 became effective October 5, 1973. Amendment 39-3732 became effective March 21, 1980. This Amendment 39-4461 became effective on September 3, 1982. ## 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 13 of 14 models: A23-24, M19A, A24R, A24, A23, A23-19, B23, B19… ## 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: 1,349 (1,349 by airframe model, 0 by engine model) - Makers: Beech 1,349 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 B24R](https://openairdocs.org/model/beech-b24r): 117 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 A24R](https://openairdocs.org/model/beech-a24r): 49 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 13 models: https://openairdocs.org/ad/73-20-07-R2/models.md Every aircraft: https://openairdocs.org/ad/73-20-07-R2/aircraft.md Its text cites no advisory circulars or STCs. ## NTSB investigations that cite this AD (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB FTW97FA313](https://openairdocs.org/ntsb/FTW97FA313), Aug 19, 1997: Beech B24R (N2521W), Albany, TX, destroyed, 2 fatal. Probable cause: The flight instructor's failure to maintain aircraft control during the takeoff/initial climb. A factor was the flight instructor's lack of experience in the make and model of aircraft. --- 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.