# AD 91-12-10: Wing Spar Attachment - Type: Airworthiness directive - Status: Current - Products: Textron 300, 300LW, B200, B200C and B200T - Effective: July 15, 1991 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small/large airplane - Amendment: 39-7021 - Docket: 90-CE-57-AD - Registered aircraft: 654 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/24C4F75C103A6CDE86256A0900693F1B.0001 - DRS record last changed: January 21, 2026 - Page: https://openairdocs.org/ad/91-12-10 ## The airworthiness directive 91-12-10 BEECH: Amendment 39-7021. Docket No. 90-CE-57-AD. Applicability: Models B200, B200C, and B200T airplanes (serial numbers (S/N) BB-1158, S/N BB-1167, S/N BB-1193 through BB-1203, S/N BB-1207 through BB-1312, S/N BB-1314 through BB- 1334, S/N BL-124 through BL-132, and S/N BT-33), and Models 300 and 300LW airplanes (S/N FA-2 through FA-190), certificated in any category. Compliance: Required as indicated, unless already accomplished. To prevent in-service fatigue failures and to allow continued operation of the interim safe life limit of 15,000 hours TIS for the lower forward wing attach fittings, accomplish the following: (a) For Model 300LW airplanes, upon the accumulation of 8,300 hours TIS or within the next 100 hours TIS after the effective date of this AD, whichever occurs later, modify the wing spar attachment by installing Beech Kit No. 101-4050. (b) For Model 300 airplanes, upon the accumulation of 9,000 hours TIS or within the next 100 hours TIS after the effective date of this AD, whichever occurs later, modify the wing spar attachment by installing Beech Kit No. 101-4050. (c) For Models B200, B200C, and B200T airplanes, upon the accumulation of 9,500 hours TIS or within the next 100 hours TIS after the effective date of this AD, whichever occurs later, modify the wing spar attachment by installing Beech Kit No. 101-4050. NOTE: Section 4-00-00 of the Beech 200 and 300 series maintenance manuals contains information related to this AD. (d) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a location where the requirements of this AD can be accomplished. (e) An alternative method of compliance or adjustment of the compliance times that provides an equivalent level of safety may be approved by the Manager, Wichita Aircraft Certification Office, FAA, 1801 Airport Road, Room 100, Wichita, Kansas 67209. The request should be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Wichita Aircraft Certification Office. (f) All persons affected by this directive may obtain the service kit and maintenance manual information referred to herein upon request to the Beech Aircraft Corporation, P.O. Box 85, Wichita, Kansas 67201-0085; or may examine information that is applicable to this AD at the FAA, Central Region, Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106. This amendment (39-7021, AD 91-12-10) becomes effective on July 15, 1991. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A24CE](https://openairdocs.org/tcds/A24CE): Textron Aviation Inc.; names 4 of 37 models: 300, 300LW, B200T, B200C (C-12R) ## 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: 654 (654 by airframe model, 0 by engine model) - Makers: Beech 428, Raytheon 211, Hawker Beechcraft 12, Beech Acft 1, CASA 1, Textron 1 Models with the most aircraft: - [Beech B200](https://openairdocs.org/model/beech-b200): 281 aircraft (airframe model) - [Raytheon B200](https://openairdocs.org/model/raytheon-b200): 206 aircraft (airframe model) - [Beech 300](https://openairdocs.org/model/beech-300): 125 aircraft (airframe model) - [Beech B200C](https://openairdocs.org/model/beech-b200c): 16 aircraft (airframe model) - [Hawker Beechcraft B200](https://openairdocs.org/model/hawker-beechcraft-b200): 12 aircraft (airframe model) - [Beech 300LW](https://openairdocs.org/model/beech-300lw): 6 aircraft (airframe model) - [Raytheon B200C](https://openairdocs.org/model/raytheon-b200c): 5 aircraft (airframe model) - [Beech Acft B200T](https://openairdocs.org/model/beech-acft-b200t): 1 aircraft (airframe model) - [CASA 300](https://openairdocs.org/model/casa-300): 1 aircraft (airframe model) - [Textron B200 KING AIR](https://openairdocs.org/model/textron-b200-king-air): 1 aircraft (airframe model) All 10 models: https://openairdocs.org/ad/91-12-10/models.md Every aircraft: https://openairdocs.org/ad/91-12-10/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.