# STC SA1435WE - 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 180J and K, actuated elevator trip system and installation of SC-100 stall warning system. (180, A, B, C, D, E, F, G, H, J, K LANDPLANE; FLOATPLANE AND AMPHIBIAN) - Applied: May 12, 1967 - Status date: July 31, 2017 - Product: Aircraft, Small Airplane - Certification basis: Part 3, Part 21 - Data sheets: [TCDS 5A6](https://openairdocs.org/tcds/5A6) - Certificate PDF: https://openairdocs.org/files/sha256/d7/5b/d75b56c9a49ad586b613596feaa41ca2ba855751c7d4aa51db0e1e3caf69a1de - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/135EE1668B993A3E8625871F0009780F.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA1435WE ## 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 (11) - Textron Aviation Inc. 180 ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 180A ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 180B ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 180C ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 180D ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 180E ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 180F ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 180G ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 180H ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 180J ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 180K ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) ## 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 4 Reissued on July 31, 2017 to supersede the original STC, which has been lost or misplaced. Number: SA1435WE Part 3 of the Civil Air Regulations, effective November 1, 1949. Original Product – Type Certificate Number: 5A6 Make: Cessna Model: 180 through 180H, 180J, and 180K Landplane, Floatplane and Amphibian Installation of drooped ailerons in flaps down mode, re-contoured wing leading edge, except 180J and 180K, and as options, a flap actuated elevator trim system and installation of the SC-100 stall warning system in accordance with Robertson Aircraft FAA Sealed Drawing List No. 10. Date of Application: May 12, 1967 Date Reissued: 1/15/69; 5/22/72; 11/5/73; 11/8/84; 10/10/86; 7/21/05; 7/31/17 Date of Issuance: June 21, 1967 Date Amended: 10/11/67; 8/4/69; 11/30/70; 5/22/72; 3/23/73; 12/2/76 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 4 Transfer the ownership of Supplemental Type Certificate Number: SA1435WE 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: SA1435WE FAA Form 8110-2 (5/14) Page 3 of 4 Date of Issuance: June 21, 1967 Amended Date: December 2, 1976 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 of those 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 5A6 apply except as follows: This Addendum which is part of Supplemental Type Certificate No. SA1435WE 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 180 4PCL-SM (NORMAL CATEGORY)** C. G. Range Straight line variation between points given Amphibian with (+40.4) to (+43.9) @ 2850 lb. EDO 289-2700 (+36.0) to (+43.9) @ 2258 lb. or less Control Surface Movements **AILERONS** Flap Droop from Setting Neutral ± 2° Up ± 2° Down ± 2° 0° 0° + 2° 20° 14° 20° 13° + 2° 6° 25° 30° 15° + 2° 4° 26° 40° 12.5° + 0° -2° 6° 24° **II. MODEL 180A 4PCL-SM (NORMAL CATEGORY) MODEL 180B 4PCL-SM (NORMAL CATEGORY)** C. G. Range See Section I of this STC Addendum. Control Surface Movements See Section I of this STC Addendum. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA1435WE FAA Form 8110-2 (5/14) Page 4 of 4 Date of Issuance: June 21, 1967 Amended Date: December 2, 1976 Date of Reissuance: July 31, 2017 III. MODEL 180C 4PCL-SM (NORMAL CATEGORY) MODEL 180D 4PCL-SM (NORMAL CATEGORY) MODEL 180E 4PCL-SM (NORMAL CATEGORY) MODEL 180F 4PCL-SM (NORMAL CATEGORY) C. G. Range See Section I of this STC Addendum. Control Surface Movements See Section I of this STC Addendum. IV. MODEL 180G 6PCL-SM (NORMAL CATEGORY) MODEL 180H 6PCL-SM (NORMAL CATEGORY) MODEL 180K 6PCL-SM (NORMAL CATEGORY) C. G. Range Straight line variation between points given Amphibian with (+41.2) to (+43.9) @ 2950 lb. EDO 597-2790 (+36.0) to (+43.9) @ 2258 lb. or less Control Surface Movements **AILERONS** Flap Droop from Setting Neutral ± 2° Up ± 2° Down ± 2° 0° 0° 20° 14° 25° 15° 1° 26° 38° + 2° 12.5° + 0° 5° 26° **V. MODEL 180J 6PCL-SM (NORMAL CATEGORY)** C. G. Range See Section IV of this STC Addendum. Control Surface Movements See Section IV of this STC Addendum. -END- United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA1435WE FAA Form 8110-2 (5/14) Page 5 of 4 ## Every issue (2) - July 31, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/d7/5b/d75b56c9a49ad586b613596feaa41ca2ba855751c7d4aa51db0e1e3caf69a1de) - July 21, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/15/49/154932181cbc3f457777eaae8d5b36d8c0ae9e772323129ce5762e5f92633cac) --- 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.