# AD 90-08-17: Fuselage Moisture Drain System - Type: Airworthiness directive - Status: Current - Products: Textron 100, 200, 200C, 200CT, 200T, 300, 65-90, 65-A90, A100, A200 (C-12A), A200 (C-12C), A200C (UC-12B) and 23 more - Effective: May 7, 1990 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small/large airplane - Amendment: 39-6564 - Docket: 89-CE-39-AD - Registered aircraft: 1,559 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8E98DB677D15066C86256A0900692B37.0001 - DRS record last changed: January 21, 2026 - Page: https://openairdocs.org/ad/90-08-17 ## The airworthiness directive 90-08-17 BEECH: Amendment 39-6564. Docket No. 89-CE-39-AD. Applicability: Models 65-90, 65-A90, B90, C90 and C90A (Serial Numbers (S/N) LJ-1 through LJ-1222); E90, F90, H90, 100, A100 and B100 (all S/N); 200 and B200 (S/N BB-2 through BB-1344); 200C, B200C, 200CT, B200CT, 200T, B200T, A200, A200C and A200CT (all S/N); and 300 (S/N FA-1 through FA-204 and FF-1 through FF-19) 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 water accumulation in the aft fuselage which can freeze and restrict control movement, accomplish the following in accordance with the instructions in Beech Service Bulletin Number 2312, dated December 1989: (a) Inspect the aft fuselage moisture drain system. (1) If the drain system is unobstructed and the drain openings are not undersized, no further action is required. (2) If any obstruction of thedrain system or any undersized opening is found, prior to further flight remove the obstruction or enlarge the opening as required; and (3) Report, in writing, any defects found to the Manager, Wichita Aircraft Certification Office (address below) within 7 days of the inspection. (Reporting approved by the Office of Management and Budget under OMB No. 2120-0056.) (b) Airplanes may be flown in accordance with FAR 21.197 to a location where the AD may be accomplished. (c) An alternate method of compliance or adjustment of the compliance time which 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. NOTE: The request should be forwarded through an FAA Maintenance Inspector, who may add comments and then send it to the Manager, Wichita Aircraft Certification Office. All persons affected by this directive may obtain copies of the document referred to herein upon request to the Beech Aircraft Corporation, Commercial Service, Department 52, P.O. Box 85, Wichita, Kansas 67201-0085; Telephone (316) 681-7111; or may examine this document at the FAA, Central Region, Office of the Assistant Chief Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106. This amendment (39-6564, AD 90-08-17) becomes effective on May 7, 1990. ## Affected data sheets (4) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A24CE](https://openairdocs.org/tcds/A24CE): Textron Aviation Inc.; names 11 of 37 models: B200CT, 200, A200C (UC-12B), A200 (C-12A), 300, 200CT, 200T, B200T… - [TCDS 3A20](https://openairdocs.org/tcds/3A20): Textron Aviation Inc.; names 6 of 22 models: B90, E90, 65-A90, H90, 65-90, C90 - [TCDS A14CE](https://openairdocs.org/tcds/A14CE): Textron Aviation Inc.; names 3 of 12 models: B100, A100, 100 - [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: 1,559 (1,559 by airframe model, 0 by engine model) - Makers: Beech 1,327, Raytheon 217, 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) - [Beech C90](https://openairdocs.org/model/beech-c90): 216 aircraft (airframe model) - [Raytheon B200](https://openairdocs.org/model/raytheon-b200): 206 aircraft (airframe model) - [Beech E-90](https://openairdocs.org/model/beech-e-90): 145 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 B100](https://openairdocs.org/model/beech-b100): 58 aircraft (airframe model) - [Beech 65-A90](https://openairdocs.org/model/beech-65-a90): 34 aircraft (airframe model) - [Beech B90](https://openairdocs.org/model/beech-b90): 29 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) - [Beech A100](https://openairdocs.org/model/beech-a100): 15 aircraft (airframe model) - [Beech 100](https://openairdocs.org/model/beech-100): 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 65-90](https://openairdocs.org/model/beech-65-90): 7 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) - [Raytheon A200CT](https://openairdocs.org/model/raytheon-a200ct): 5 aircraft (airframe model) All 32 models: https://openairdocs.org/ad/90-08-17/models.md Every aircraft: https://openairdocs.org/ad/90-08-17/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.