# AD 91-12-11: Side Windows - Type: Airworthiness directive - Status: Current - Products: Textron 200, 200C, 200CT, 200T, 300, B200, B200C, B200CT, B200T and F90 - Effective: July 15, 1991 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small/large airplane - Amendment: 39-7022 - Docket: 90-CE-44-AD - Registered aircraft: 1,004 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1D82AB27C5E8D24286256A09005C9C65.0001 - DRS record last changed: January 21, 2026 - Page: https://openairdocs.org/ad/91-12-11 ## The airworthiness directive 91-12-11 BEECH: Amendment 39-7022. Docket No. 90-CE-44-AD. Applicability: Model F90 airplanes (serial number (S/N) LA-2 through LA-236); Models 200 and B200 airplanes (S/N BB-2 through BB-1212); Models 200C and B200C airplanes (S/N BL-1 through BL-72); Models 200CT and B200CT airplanes (S/N BN-1 through BN-4); Models 200T and B200T airplanes (S/N BT-1 through BT-30); and Model 300 airplanes (S/N FA-2 through FA-56), certificated in any category. Compliance: Required as indicated after the effective date of this AD, unless already accomplished. To prevent cracking and possible blowout of cast acrylic cockpit "D" side windows that could result in decompression injuries, accomplish the following: (a) Within the next 150 hours time-in-service after the effective date of this AD, accomplish the following: (1) Determine if the airplane "D" side window contains a placard bearing one of the part numbers presented below. If it does, then the window is made of stretched acrylic and no further action per this AD is required. MODEL PART NO. F90, 200, 200C, 200CT, 200T, B200 101-420081-5 through 101-420081-10; B200C, B200CT, and B200T 50-420066-419, 50-420066-420, 50-420066-437, or 50-420066-438. 300 101-420081-9 through 101-420081-12. (2) If a Model 300 airplane has a "D" side window installed in accordance with Beech Service Bulletin (SB) 2273, Revision 1, dated April 1990, then the window is stretched acrylic and no further action per this AD is required. (3) If a cast acrylic "D" side window is installed or if the window material cannot be determined, prior to further flight, inspect the window for cracks, chips, stress crazes, fissure scratches, or other damage in accordance with Part I of Beech SB No. 2208, Revision 1, dated July 1990. (i) If cracks, chips, stress crazes, fissure scratches, or other damage that exceeds the limits specified in Beech SB No. 2208, Revision 1, dated July 1990, is found, prior to further flight, except as noted in paragraph (b) of this AD, replace the window with the applicable stretched acrylic window listed in paragraph (a)(1) of this AD. (ii) If no cracks, chips, stress crazes, fissure scratches, or other damage that exceeds the limits specified in Beech SB No. 2208, Revision 1, dated July 1990, is found, within the next 12 calendar months, except as noted in paragraph (b) of this AD, replace each cast acrylic "D" side window in the crew compartment with the applicable stretched acrylic window listed in paragraph (a)(1) of this AD. (b) If stretched acrylic windows are not available, but have been ordered, the airplane may be operated unpressurized until the stretched acrylic windows are installed provided that the placards specified on page 10 of Beech SB No. 2208, Revision 1, dated July 1990, are installed in clear view of the pilot's position. (c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199to operate airplanes to a location where the requirements of this AD can be accomplished. (d) 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 send it to the Manager, Wichita Aircraft Certification Office. (e) All persons affected by this directive may obtain copies of the documents referred to herein upon request to the Beech Aircraft Corporation, Commercial Service, Department 52, Wichita, Kansas 67201-0085 or may examine these documents at the FAA, Central Region, Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106. This amendment (39-7022, AD 91-12-11) becomes effective on July 15, 1991. ## Affected data sheets (2) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A24CE](https://openairdocs.org/tcds/A24CE): Textron Aviation Inc.; names 8 of 37 models: B200CT, 200, 300, 200CT, 200T, B200T, 200C, B200C (C-12R) - [TCDS A31CE](https://openairdocs.org/tcds/A31CE): Textron Aviation Inc.; names 1 of 1 models: F90 ## 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: 1,004 (1,004 by airframe model, 0 by engine model) - Makers: Beech 778, 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) - [Beech 200](https://openairdocs.org/model/beech-200): 234 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 F90](https://openairdocs.org/model/beech-f90): 107 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 200T](https://openairdocs.org/model/beech-200t): 8 aircraft (airframe model) - [Beech 200C](https://openairdocs.org/model/beech-200c): 7 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 13 models: https://openairdocs.org/ad/91-12-11/models.md Every aircraft: https://openairdocs.org/ad/91-12-11/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.