# AD 87-20-04: Fuel System - Type: Airworthiness directive - Status: Current - Products: Cessna 185, 185A, 185B, 185C, 185D, 185E, A185E and A185F - Effective: September 30, 1987 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-5733 - Registered aircraft: 1,598 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/75105E309872664386256A4F00458947.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/87-20-04 ## The airworthiness directive 87-20-04 CESSNA: Amendment 39-5733. Applies to Model 185, 185A, 185B, 185C, 185D, 185E, A185E and A185F (Serial Numbers 185-0001 thru 18503153) airplanes certificated in any category. Compliance: Within the next 50 hours of operation or before completion of the next annual inspection, whichever comes first, after the effective date of this AD, unless already accomplished per AD 84-10-01. To prevent power loss or engine stoppage due to water contamination of the fuel system, accomplish the following: (a) Modify the aircraft fuel system using one of the options on the following subparagraphs (a)(1), (a)(2), or (a)(3). (1) Install fuel reservoir (accumulator) quick drains in accordance with STC SA2272CE. This STC is owned by Mike Kelley Aircraft Inc., P.O. Box 541, Wellington, Kansas 67152, telephone (316) 326-8581. This STC is applicable to Cessna 185 and 185A thru 185E, A185E and A185F Serial Numbers 185-0001 thru 18503153. (2) Install fuel reservoir (accumulator) quick drains in accordance with STC SA2245CE. This STC is owned by Safe Air Repair, Inc., 3325 Bridge Avenue, Albert Lea, Minnesota 56007, telephone (507) 373-5408. This STC is applicable to Cessna 185A thru 185E, A185E and A185F, Serial Numbers 185-0414 thru 18503153. (3) Install quick drains in the fuel reservoir (accumulator) outlet line by using equivalent aircraft standard hardware. NOTE: A one-time inspection of the Cessna fuel line Part Number 0500106-329 which is used on Serial Number 185-0001 thru 185-0413 should be performed during installation of the fuel reservoir quick drains. This fuel line requires careful attention to routing in order to insure adequate clearance from moving control components located immediately adjacent to this fuel line. (b) Airplanes may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished if it is determined that no water is present in the fuel reservoir (accumulator) or any other part of the fuel system from which fuel will be used. (c) An equivalent means of compliance with this AD may be used, if approved by the Manager, Aircraft Certification Office, Federal Aviation Administration, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209. All persons affected by this AD may obtain copies of the document(s) referred to herein upon request to FAA, Office of the Regional Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106. This amendment becomes effective on September 30, 1987. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS 3A24](https://openairdocs.org/tcds/3A24): Textron Aviation Inc.; names 8 of 8 models: 185B, A185F, 185E, 185C, A185E, 185A, 185D, 185 ## 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: 1,598 (1,598 by airframe model, 0 by engine model) - Makers: Cessna 1,598 Models with the most aircraft: - [Cessna A185F](https://openairdocs.org/model/cessna-a185f): 1,120 aircraft (airframe model) - [Cessna A185E](https://openairdocs.org/model/cessna-a185e): 252 aircraft (airframe model) - [Cessna 185](https://openairdocs.org/model/cessna-185): 98 aircraft (airframe model) - [Cessna 185A](https://openairdocs.org/model/cessna-185a): 48 aircraft (airframe model) - [Cessna 185D](https://openairdocs.org/model/cessna-185d): 30 aircraft (airframe model) - [Cessna 185C](https://openairdocs.org/model/cessna-185c): 22 aircraft (airframe model) - [Cessna 185B](https://openairdocs.org/model/cessna-185b): 14 aircraft (airframe model) - [Cessna 185E](https://openairdocs.org/model/cessna-185e): 14 aircraft (airframe model) All 9 models: https://openairdocs.org/ad/87-20-04/models.md Every aircraft: https://openairdocs.org/ad/87-20-04/aircraft.md ## Related documents - [STC SA2245CE](https://openairdocs.org/stc/SA2245CE): Installation of fuel reservoir quick drain. Data required: Safe Air Repair Drawing List No. 1, dated March 16, 1987, or later FAA Approved Revisions.. Aero Fabricators Co, Cited in the text - [STC SA2272CE](https://openairdocs.org/stc/SA2272CE): Installation of fuel reservoir(accumulator) quick drain. (A185F THRU S/N 18503153). Air Plains Services Corporation, Cited in the text --- 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.