# AD 93-25-07: Fuselage Stringers - Type: Airworthiness directive - Status: Historical - Products: Raytheon 200 Model or Series (all), 200C, 200CT, 200T, 300, A100-1 (U-21J), A200, A200 (C-12A), A200 (C-12C), A200C (UC-12B), A200CT (C-12D), A200CT (C-12F) and 13 more - Effective: February 15, 1994 - Superseded by: [AD 2005-01-18](https://openairdocs.org/ad/2005-01-18) - Product type: Aircraft, Small/large airplane - Amendment: 39-8773 - Docket: 93-CE-38-AD - Registered aircraft: 1,483 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AE234D6DBCFCA71E86256A09005CA1D5.0001 - DRS record last changed: August 7, 2025 - Page: https://openairdocs.org/ad/93-25-07 ## The airworthiness directive 93-25-07 BEECH AIRCRAFT CORPORATION: Amendment 39-8773. Docket No. 93-CE-38-AD. Applicability: The model and serial number airplanes presented below, certificated in any category, that do not have all the fuselage stringers Nos. 5 through 11 modified on both the right and left hand sides in accordance with either (1) Beech Service Bulletin (SB) 2472, Revision 1, dated September 1993; (2) Chapter 51-10 or 53-10, as applicable, of the maintenance manual; or (3) the instructions to Priester Aviation Service Supplemental Type Certificate (STC) SA63CH: Models Serial Numbers 200, A200, B200, and A100-1 BB-2 through BB-1462, BC-1 through BC-75, and BD-1 through BD-30 200C, A200C, and B200C BL-1 through BL-138, BJ-1 through BJ-66, BU-1 through BU-12, and BV-1through BV-12 200CT, A200CT, B200CT BN-1 through BN-4, BP-1 through BP-71, FC-1, FC-2, FC-3, FE-1 through FE-31, FG-1, FG-2, and GR-1 through GR-19 200T and B200T BT-1 through BT-38 300 FA-1 through FA-228 300 (FAA) FF-1 through FF-19 B300 FL-1 through FL-103 B300C FM-1 through FM-8 and FN-1 Compliance: Required upon the accumulation of 3,000 hours time-in-service (TIS) or within the next 100 hours TIS after the effective date of this AD, whichever occurs later, unless already accomplished, and thereafter as indicated. To prevent structural damage to the fuselage caused by cracked stringers in the rear pressure bulkhead area, accomplish the following: (a) Inspect fuselage stringers Numbers (Nos.) 5 through 11 on both the left and right hand sides for cracks in accordance with the ACCOMPLISHMENT INSTRUCTIONS section of Beech SB No. 2472, Revision 1, dated September 1993. (1) If no cracks are found, reinspect at intervals that correspond with the following: Stringers Modified in Accordance With One of the Three Modifications Referenced in the Applicability Section of this AD Inspection Interval No Stringers Modified 600 hours TIS on all stringers Nos. 8, 9, and 10 (one side) with Internal Modification 1,200 hours TIS on unmodified stringers Nos. 8, 9, and 10 (one side) with External Modification 600 hours TIS on unmodified stringers Nos. 5 through 11 AD no longer applies (2) If cracks are found, modify all cracked fuselage stringers at any time up to the time specified in the chart presented in paragraph (a)(3) of this AD. Accomplish this modification in accordance with the instructions in one of the three modifications specified in the Applicability section of this AD, and reinspect at intervals presented in the chart in paragraph (a)(1) of this AD. (3) The following chart specifies the required compliance time where cracked stringers must be modified: No. of Stringers Cracked on Any One Side of Fuselage When Modification Must be Accomplished (Hours TIS) 1 to 3 150 4 30 5 or more Prior to further flight (b) The modifications specified in the Applicability section of this AD may be accomplished at any time as terminating action for the inspection requirement of this AD provided that all fuselage stringers Nos. 5 through 11 are modified. (c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. (d) An alternative method of compliance or adjustment of the compliance time that provides an equivalent level of safety may be approved by the Manager, Wichita Aircraft Certification Office (ACO), 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 ACO. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Wichita ACO. (e) The inspections and modification required by this AD shall be done in accordance with Beech Service Bulletin 2472, Revision 1, dated September 1993. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from the Beech Aircraft Corporation, P.O. Box 85, Wichita, Kansas 67201-0085. Copies may be inspected at the FAA, Central Region, Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri, or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (f) This amendment (39-8773) becomes effective on February 15, 1994. ## 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 13 of 37 models: B200CT, A100-1 (U-21J), A200C (UC-12B), A200 (C-12A), B300C (MC-12W), 300, 200CT, 200T… ## 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: 1,483 (1,483 by airframe model, 0 by engine model) - Makers: Beech 558, Raytheon 454, Textron 230, Hawker Beechcraft 170, Beechcraft 69, Beech Acft 1, CASA 1 Models with the most aircraft: - [Beech B200](https://openairdocs.org/model/beech-b200): 281 aircraft (airframe model) - [Raytheon B300](https://openairdocs.org/model/raytheon-b300): 233 aircraft (airframe model) - [Raytheon B200](https://openairdocs.org/model/raytheon-b200): 206 aircraft (airframe model) - [Textron B300](https://openairdocs.org/model/textron-b300): 195 aircraft (airframe model) - [Hawker Beechcraft B300](https://openairdocs.org/model/hawker-beechcraft-b300): 144 aircraft (airframe model) - [Beech 300](https://openairdocs.org/model/beech-300): 125 aircraft (airframe model) - [Beech B300](https://openairdocs.org/model/beech-b300): 85 aircraft (airframe model) - [Beechcraft B300](https://openairdocs.org/model/beechcraft-b300): 64 aircraft (airframe model) - [Textron B300C](https://openairdocs.org/model/textron-b300c): 34 aircraft (airframe model) - [Beech A200](https://openairdocs.org/model/beech-a200): 17 aircraft (airframe model) - [Beech B200C](https://openairdocs.org/model/beech-b200c): 16 aircraft (airframe model) - [Hawker Beechcraft B300C](https://openairdocs.org/model/hawker-beechcraft-b300c): 14 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) - [Beech B300C](https://openairdocs.org/model/beech-b300c): 5 aircraft (airframe model) - [Beechcraft B300C](https://openairdocs.org/model/beechcraft-b300c): 5 aircraft (airframe model) - [Raytheon B300C](https://openairdocs.org/model/raytheon-b300c): 5 aircraft (airframe model) - [Raytheon B200C](https://openairdocs.org/model/raytheon-b200c): 5 aircraft (airframe model) - [Raytheon A200CT](https://openairdocs.org/model/raytheon-a200ct): 5 aircraft (airframe model) All 31 models: https://openairdocs.org/ad/93-25-07/models.md Every aircraft: https://openairdocs.org/ad/93-25-07/aircraft.md ## Related documents - [AD 2005-01-18](https://openairdocs.org/ad/2005-01-18): Fuselage stringers · Textron 200, 200C, 200CT and 24 more. Effective Mar 1, 2005. Supersedes this AD - [STC SA63CH](https://openairdocs.org/stc/SA63CH): Install aft pressure bulkhead support beams.. Priester Aviation Service, Named in the applicability --- 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.