# AD 93-25-15: Escape Hatch Substructure Rivets - Type: Airworthiness directive - Status: Current - Products: Textron 400A and 400T - Effective: February 14, 1994 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-8779 - Docket: 93-NM-136-AD - Registered aircraft: 299 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3A69A8E126A509C386256A09005E45A0.0001 - DRS record last changed: January 21, 2026 - Page: https://openairdocs.org/ad/93-25-15 ## The airworthiness directive 93-25-15 BEECH AIRCRAFT CORPORATION: Amendment 39-8779. Docket 93-NM-136-AD. Applicability: Model 400A airplanes having serial numbers RK-1 through RK-57 inclusive, RK-59, RK-60, and RK-62 through RK-66 inclusive; and Model 400T airplanes having serial numbers TT-02 through TT-30 inclusive, and TT-32; certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent reduced structural capability of the airframe, accomplish the following: (a) Within 200 hours time-in-service after the effective date of this AD, inspect the rivets in the escape hatch substructure to verify that the proper rivets are installed in accordance with Beechcraft Service Bulletin 2509, dated July 1993. (1) If the rivet is part number (P/N) MS20470E6, no further action is required by this AD. (2) If the rivet is not P/N MS20470E6, prior to further flight, replace the rivet with a new Cherry Max rivet or a HI-LOK fastener, in accordance with Beechcraft Service Bulletin 2509, dated July 1993. (b) As of the effective date of this AD, no person shall install any rivet having P/N MS20470AD5 in the location shown in Figure 1 of Beechcraft Service Bulletin 2509, dated July 1993, on any airplane. (c) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Wichita Aircraft Certification Office (ACO), FAA, Small Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then 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. (d) 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. (e) The inspection and replacement shall be done in accordance with Beechcraft Service Bulletin 2509, dated July 1993. (NOTE: The issue date of Service Bulletin 2509 is indicated only on page 1 of the document; no other page of this document is dated.) 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 Beech Aircraft Corporation, P.O. Box 85, Wichita, Kansas 67201-0085. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, Small Airplane Directorate, Wichita Aircraft Certification Office, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (f) This amendment becomes effective on February 14, 1994. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A16SW](https://openairdocs.org/tcds/A16SW): Textron Aviation Inc.; names 2 of 4 models: 400A, 400T ## 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: 299 (299 by airframe model, 0 by engine model) - Makers: Raytheon 216, Beech 44, Hawker Beechcraft 39 Models with the most aircraft: - [Raytheon 400A](https://openairdocs.org/model/raytheon-400a): 216 aircraft (airframe model) - [Beech 400A](https://openairdocs.org/model/beech-400a): 43 aircraft (airframe model) - [Hawker Beechcraft 400A](https://openairdocs.org/model/hawker-beechcraft-400a): 39 aircraft (airframe model) - [Beech 400T](https://openairdocs.org/model/beech-400t): 1 aircraft (airframe model) All 5 models: https://openairdocs.org/ad/93-25-15/models.md Every aircraft: https://openairdocs.org/ad/93-25-15/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.