# STC SA1441WE - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Sierra Industries Ltd., United States - Description: Installation of drooped ailerons in flaps down mode, recontoured wing leading edge (except A185F) stall fence, flap actuated elevator trim system and installation of SC-100 stall warning system. (A185F LANDPLANE; FLOATPLANE; AMPHIBIAN; SKIPLANE) - Applied: May 12, 1967 - Status date: July 31, 2017 - Product: Aircraft, Small Airplane - Certification basis: Part 3, Part 21 - Data sheets: [TCDS 3A24](https://openairdocs.org/tcds/3A24) - Certificate PDF: https://openairdocs.org/files/sha256/9e/da/9eda820d92f2fcc9db3316f5c73a46df0051e712f8ec27578326d3daab241d7e - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DBA5D8FE93998C9F8625871F0009AD4D.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA1441WE ## ADs that name it (1) - [AD 83-17-06](https://openairdocs.org/ad/83-17-06): Aileron Balance Weights · Flap actuated aileron droop system (Sierra Industries STC SA1382WE or 5 others). Effective Sep 1, 1983. Named in the applicability ## Approved models (8) - Textron Aviation Inc. 185 ([TCDS 3A24](https://openairdocs.org/tcds/3A24)) - Textron Aviation Inc. 185A ([TCDS 3A24](https://openairdocs.org/tcds/3A24)) - Textron Aviation Inc. 185B ([TCDS 3A24](https://openairdocs.org/tcds/3A24)) - Textron Aviation Inc. 185C ([TCDS 3A24](https://openairdocs.org/tcds/3A24)) - Textron Aviation Inc. 185D ([TCDS 3A24](https://openairdocs.org/tcds/3A24)) - Textron Aviation Inc. 185E ([TCDS 3A24](https://openairdocs.org/tcds/3A24)) - Textron Aviation Inc. A185E ([TCDS 3A24](https://openairdocs.org/tcds/3A24)) - Textron Aviation Inc. 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. FAA Form 8110-2 (5/14) Page 1 of 5 Reissued on July 31, 2017 to supersede the original STC, which has been lost or misplaced. Number: SA1441WE Part 3 of the Civil Air Regulation, effective May 15, 1956, as amended by 3-1 through 3-5. Original Product – Type Certificate Number: 3A24 Make: Cessna Model: 185, 185A thru 185E, A185E, A185F Landplane, Floatplane, Amphibian, and Skiplane Installation of drooped ailerons in flaps down mode, recontoured wing leading edge (except A185F) stall fence and as options, a flap actuated elevator trim system and installation of the SC-100 stall warning system in accordance with R/STOL Systems, Inc. FAA Sealed Drawing List No. 10. This change in type design is also eligible on Cessna Model 185 thru Skiplane conversion under STC No. SA3-717. Date of Application: May 12, 1967 Date Reissued: 1/15/69; 8/4/69; 4/26/72; 11/5/73; 11/8/84; 10/10/86; 7/21/05; 7/31/17 Date of Issuance: June 29, 1967 Date Amended: 8/14/68; 8/4/69; 2/19/70; 11/30/70; 3/13/72; 4/26/72; 3/21/73; 2/10/75; 7/9/85 Signature Title Jim Grigg Manager, Fort Worth A CO Branch, Compliance & Airworthiness Division Sierra Industries, Ltd. 122 Howard Langford Drive Uvalde, TX 78801 FAA Form 8110-2 (5/14) Page 2 of 5 Transfer the ownership of Supplemental Type Certificate Number: SA1441WE To (Name and address of transferee) From (Name and address of grantor) United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA1441WE FAA Form 8110-2 (5/14) Page 3 of 5 Date of Issuance: June 29, 1967 Date Amended: July 9, 1985 Date of Reissuance: July 31, 2017 The approval of this change in type design applies basically to the above model aircraft only. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. This determination should include consideration of significant changes in weight distribution, such as an increase in the fixed disposable weight in the fuselage. The limitations and conditions of Type Certificate Data Sheet 3A24 apply except as follows: This Addendum which is part of Supplemental Type Certificate No. SA1441WE prescribes conditions and limitations under which the product for which the STC was issued meets the airworthiness requirements of the Civil Air Regulations. A copy of this Addendum shall be maintained as part of the modified aircraft permanent records. Supplemental Type Certificate Holder: R/STOL Systems, Inc. I. MODEL 185 6PCL-SM (NORMAL CATEGORY) MODEL 185A 6PCL-SM (NORMAL CATEGORY) MODEL 185B 6PCL-SM (NORMAL CATEGORY) MODEL 185C 6PCL-SM (NORMAL CATEGORY) MODEL 185D 6PCL-SM (NORMAL CATEGORY) C. G. Range **AMPHIBIAN** (+41.0) to (+46.5) @ 3100 lb. (+36.8) to (+46.5) @ 2500 lb. or less straight line variation between points Control Surface Movements Aileron 10 – 100 Inst’l Optional 10-110 Inst’l Flap Droop from Up Down Flap Droop from Up Down Setting Neutral ±2° ±2° ±2° Setting Neutral ±2° ±2° ±2° 0° 0° 20° 14° 0° 0° 20° 14° 25° 15° 1° 26° 20° 13° 17° 20° 38°±2° 13° 5° 26° 40° 12.5° 16° 19° -1° United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA1441WE FAA Form 8110-2 (5/14) Page 4 of 5 Date of Issuance: June 29, 1967 Date Amended: July 9, 1985 Date of Reissuance: July 31, 2017 **II. MODEL 185E 6PCL-SM (NORMAL CATEGORY)** C. G. Range AMPHIBIAN: Same as I above. Control Surface Movements AILERONS: Same as I above. **III. MODEL A185E 6PCL-SM (NORMAL CATEGORY)** C. G. Range **AMPHIBIAN** (+42.3) to (+46.5) @ 3265 lb. Wheels Takeoff Only (+41.0) to (+46.5) @ 3100 lb. (+36.8) to (+46.5) @ 2500 lb. or less straight line variation between points Control Surface Movements AILERONS: 10 – 100 Inst’l Optional 10-110 Inst’l Flap Droop from Up Down Flap Droop from Up Down Setting Neutral ±2° ±2° ±2° Setting Neutral ±2° ±2° ±2° 0° 0° 20° 14° 0° 0° 20° 14° 25° 15° 1° 26° 20° 13° 17° 20° 38°±2° 13° 5° 26° 40° 12.5° 16° 19° -1° United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA1441WE FAA Form 8110-2 (5/14) Page 5 of 5 Date of Issuance: June 29, 1967 Date Amended: July 9, 1985 Date of Reissuance: July 31, 2017 **IV. MODEL A185F 6PCL-SM (NORMAL CATEGORY)** C. G. Range **AMPHIBIAN** Same as III above. Control Surface Movements AILERONS Same as III above. “FAA Approved R/STOL Systems Inc. Pilot’s Operating Handbook Supplement P OHS 10-110 dated June 26 June 1985, or other FAA approved requirements.” -END- United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA1441WE FAA Form 8110-2 (5/14) Page 6 of 5 ## Every issue (2) - July 31, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/9e/da/9eda820d92f2fcc9db3316f5c73a46df0051e712f8ec27578326d3daab241d7e) - July 21, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/d0/be/d0be2e72d25a888c8cc542ffc2f8cac49bdea95afe558e89bdf40da42fce550a) --- 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.