# STC SA2529WE - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Flint Aero Inc, United States - Description: Installation of twelve (12) gallon auxiliary fuel tank in each wing, inboard of tip in accordance with FAA sealed Flint Aero Drawing List No. MDL FA-180, no Revision, dated December 18, 1981, or later FAA approved revision, or Flint Aero Master Drawing List No. 15171821, Revision IR , dated may 18, 2006, or later FAA approved revision. - Applied: March 30, 1972 - Status date: May 17, 2011 - Product: Aircraft, Single-Engine - Certification basis: Part 3, Part 21 - Data sheets: [TCDS 3A24](https://openairdocs.org/tcds/3A24) - Certificate PDF: https://openairdocs.org/files/sha256/d0/3e/d03ee7b2a9207cc1289d018d526439f352a0639c2cfc0ac96af8666d962b64df - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DF18C7F7A11F8F1F8625789B00667A13.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA2529WE ## ADs that name it (0) None. ## Approved models (8) - Cessna Aircraft Company 185 ([TCDS 3A24](https://openairdocs.org/tcds/3A24)) - Cessna Aircraft Company 185A ([TCDS 3A24](https://openairdocs.org/tcds/3A24)) - Cessna Aircraft Company 185B ([TCDS 3A24](https://openairdocs.org/tcds/3A24)) - Cessna Aircraft Company 185C ([TCDS 3A24](https://openairdocs.org/tcds/3A24)) - Cessna Aircraft Company 185D ([TCDS 3A24](https://openairdocs.org/tcds/3A24)) - Cessna Aircraft Company 185E ([TCDS 3A24](https://openairdocs.org/tcds/3A24)) - Cessna Aircraft Company A185E ([TCDS 3A24](https://openairdocs.org/tcds/3A24)) - Cessna Aircraft Company A185F ([TCDS 3A24](https://openairdocs.org/tcds/3A24)) ## What the certificate says Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record. Number SA2529WE This Certificate issued to Part 3 of the Civil Air Regulations. Certification basis set forth on Type Certificate Data Sheet 3A24, Rev 23. Description of Type Design Change: Installation of twelve (12) gallon auxiliary fuel tank in each wing, inboard of tip in accordance with FAA sealed Flint Aero Drawing List No. MDL FA-180, no Revision, dated December 18, 1981, or later FAA approved revision, or Flint Aero Master Drawing List No. 15171821, Revision “IR”, dated may 18, 2006, or later FAA approved revision. Limitations and Conditions: The limitations and conditions of Data Sheet 3A24 apply, except as outlined in page 3 of this STC. A copy of this STC must be included in the permanent records of each airplane modified in accordance with this STC. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission. Flint Aero, Inc. 1942 Joe Crosson Drive El Cajon, California 92020-1236 Original Product Type Certificate Number: 3A24 **CESSNA** 185, 185A, 185B, 185C, 185D, 185E, A185E, and A185F Landplane and Floatplane Date of application: March 30, 1972 Date of issuance: May 18, 1972 Date reissued: Mar. 8, 1976, Mar. 9, 1987, June 15, 1990, Feb. 25, 2000, May 17, 2011 Date amended: See Page 4 of this STC ( Signature) Supervisor, Technical & Administrative Support Staff Los Angeles Aircraft Certification Office (Tl ) Transfer the ownership of the Supplemental Type Certificate Number to (Name of transferee) (Address of transfer) (Number and street) (City, State, and Zip code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and Zip code) Extent of Authority (if licensing agreement): Signature of grantor (In ink): Number SA2529WE Application: 03/30/72 Issue: 05/18/72 Amendments: See page 4 of this STC Reissue: 03/08/76, 03/09/87, 06/15/90, 02/25/2000, 5/17/2011 **LIMITATIONS AND CONDITIONS** Fuel Capacity Model 185 through A185F S/N 18502262 - 89 gal. (85 gal. useable); two 32.5 gal. main tanks in wings at (+48) and two 12 gal. (11.5 gal. useable) aux. tanks in wings at (+50). Model A185F S/N 18502263 through 18502838, except 18502300 – 85 gal. (81 gal. useable); two 30.5 gal. main tanks in wings at (+48) and Two 12 gal. (11.5 gal. useab le) aux. tanks in wings at (+50). Model A185F S/N 18502839 through 18503683 – 85 gal. (78 gal. useable); two 30.5 gal, main tanks at (+48) and two 12 gal. (11.5 gal. useable) aux. tanks in wings at (+50). Model A185F S/N 18502300, 18503684 and up – 112 gal. (107 gal. useable); two 44 gal, main tanks at (+48) and two 12 gal. (11.5 gal. useable) aux. tanks in wings at (+50). Placards The following placards are required in the locations noted: Adjacent to auxiliary tank pump switches: “ Aux. fuel 12 U.S. Gal. (11.5 gal. useable). Transfer Aux. fuel only in level flight when main tank is half empty and when ma in tank is not supplying engine. Aux. switch must be off during takeoff, landing, filling and when empty.” Adjacent to each auxiliary tank filler: “12 U.S. Gal. 80/87 Min. grade Av. Gasoline. Aux. fuel switch must be off before filling.” Number SA2529WE Application: 03/30/72 Issue: 05/18/72 Reissue: 03/08/76, 03/09/87, 06/15/90, 02/25/2000, 5/17/2011 LIMITATIONS AND CONDITIONS ( Continued) Limitation of The approval of this change in type design applies to the basic Applicability Cessna 185 series of the m odels shown on page 1 of this STC. This approval should not be exte nded to other aircraft of these models on which other modifications are incorporated unless it is determined that the interrelations hip between this change and any previously approved modifications will introduce no adverse effect on the airworthiness of these aircraft. Amendment Dates 1. March 1, , 1973 2. August 7, 1973 3. April 23, 1975 4. September 20, 1977 5. February 16, 1982 6. January 8, 2007 add MDL 15171821 Rev “IR” - END - ## Every issue (2) - May 17, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/d0/3e/d03ee7b2a9207cc1289d018d526439f352a0639c2cfc0ac96af8666d962b64df) - January 8, 2007: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/99/d3/99d3b701ff1c11cc6379f47649eb8fd6afafe3f3663924c5c968c8c3af3ea044) --- 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.