# AD 85-05-02: Fuel Selector Guard Modification - Type: Airworthiness directive - Status: Current - Products: Textron 19A, 23, A23, A23-19, A23-24, A23A, A24, A24R, B19, B23, B24R, C23 and 2 more - Effective: April 25, 1985 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-5012 - Registered aircraft: 1,525 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5914532CBDD4A352862569B300528718.0001 - DRS record last changed: January 21, 2026 - Page: https://openairdocs.org/ad/85-05-02 ## The airworthiness directive 85-05-02 BEECH: Amendment 39-5012. Applies to Models 23 (S/N M-2, M-4 thru M-554); A23 (S/N M-3, M-555 thru M-900); A23A (S/N M-901 thru M-1094); A23-19 (S/N MB-1 thru MB-288); A23-24 (S/N MA-1 thru MA-363); A24 (S/N MA-364 thru MA-368); 19A (S/N MB-289 thru MB-460); M19A (S/N MB-461 thru MB-480); B19 (S/N MB-481 thru MB-905); B23 (S/N M-1095 thru M-1284); C23 (S/N M-1285 thru M-2223); A24R (S/N MC-2 thru MC-150); B24R (S/N MC-152 thru MC-448, MC-450, MC-451); and C24R (S/N MC-449, MC-452 thru MC-688, MC-690 thru MC-695) airplanes certificated in any category. Compliance: Required within the next 100 hours time-in-service after the effective date of this AD, unless already accomplished. To prevent the inadvertent selection of a fuel selector "off" position, accomplish the following: (a) Modify the fuel selector guard by incorporating the Selector Stop, Part Number 169-920041-9 and appropriate decal as described in Beechcraft Mandatory Service Bulletin No. 2053 dated February 1985, or Beechcraft Service Instructions No. 1095, Revision 1. (b) Airplanes may be flown in accordance with FAR 21.197 to a location where the AD may be accomplished. (c) An equivalent means of compliance with the AD may be used, if approved, by the Manager, Wichita Aircraft Certification Office, Federal Aviation Administration, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209; telephone (316) 946- 4400. This amendment becomes effective on April 25, 1985. ## 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 14 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: 1,525 (1,525 by airframe model, 0 by engine model) - Makers: Beech 1,525 Models with the most aircraft: - [Beech C23](https://openairdocs.org/model/beech-c23): 456 aircraft (airframe model) - [Beech C24R](https://openairdocs.org/model/beech-c24r): 176 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 14 models: https://openairdocs.org/ad/85-05-02/models.md Every aircraft: https://openairdocs.org/ad/85-05-02/aircraft.md Its text cites no advisory circulars or STCs. ## NTSB investigations that cite this AD (3) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB WPR22FA196](https://openairdocs.org/ntsb/WPR22FA196), Jun 2, 2022: Beech 19A (N7641R), Oroville, CA, substantial damage, 2 fatal. Probable cause: The pilot’s failure to maintain proper airspeed during a turn and his exceedance of the airplane’s critical angle of attack, which resulted in an accelerated stall. Contributing to the accident was… - [NTSB ERA10FA150](https://openairdocs.org/ntsb/ERA10FA150), Feb 25, 2010: Beech C23 (N180ED), Winter Haven, FL, substantial damage, 2 fatal. Probable cause: The pilot’s improper placement of the fuel selector valve during takeoff, and his failure to maintain adequate airspeed following a total loss of engine power resulting in an inadvertent stall.… - [NTSB ATL85LA105](https://openairdocs.org/ntsb/ATL85LA105), Mar 3, 1985: Beech C23 (N2013K), Knoxville, TN, destroyed --- 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.