# STC SA2312WE - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Sierra Industries Inc, United States - Description: Installation of leading edge cuffs, stall fences, stall strips drooped ailerons, flap actuated stabilator trim system, raked wing tips(optional) and dorsal fin. - Applied: October 16, 1970 - Status date: July 31, 2017 - Product: Aircraft, Small Airplane - Certification basis: Part 3, Part 21 - Data sheets: [TCDS A1EA](https://openairdocs.org/tcds/A1EA) - Certificate PDF: https://openairdocs.org/files/sha256/36/7d/367dc99a9342b03eb7f993e335d1352841e650c8b79044f3e6f82df8fd8fbdab - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/85F5AEE94A350AC986258720004F5251.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA2312WE ## ADs that name it (1) - [AD 82-23-01 R1](https://openairdocs.org/ad/82-23-01-R1): Placard Near Flap Actuator · Leading edge cuffs, stall fences, stall strips drooped… (Sierra Industries STC SA2312WE or SA2495WE). Effective Apr 7, 1983. Named in the applicability ## Approved models (2) - Piper Aircraft Inc. PA-30 ([TCDS A1EA](https://openairdocs.org/tcds/A1EA)) - Piper Aircraft Inc. PA-39 ([TCDS A1EA](https://openairdocs.org/tcds/A1EA)) ## 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 3 Reissued on July 31, 2017 to supersede the original STC, which has been lost or misplaced. Number: SA2312WE Part 3 of the Civil Air Regulation, dated 15 May 1956 thru Amend. 3-6, Paras. 3.85(a), 3.124, 3.587, 3.705(a), 3.772, 3.778 of Amend. 3-7 and Para. 23.1545, 23.1563, 23.1585 of Amend. 23-3 to FAR 23. Original Product – Type Certificate Number: A1EA Make: Piper Model: PA-30 & PA-39 Installation of leading edge cuffs, stall fences, stall strips, drooped ailerons, flap actuated sttabilator trim system, raked wing tips (optional) and dorsal fin. Also gross weight is increased to 3800 lbs. Installation to be in accordance with FAA Sealed Robertson Aircraft Drawing List No. 18. This change has also been found to comply for aircraft with Brittain TT-5 Wing Tip Tanks Rajay Corp. Model 325 H 10 Turbochargers Date of Application: October 16, 1970 Date Reissued: 11/8/84; 10/10/86; 9/8/05; 7/31/17 Date of Issuance: February 12, 1971 Date Amended: April 02, 1971 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 3 Transfer the ownership of Supplemental Type Certificate Number: SA2312WE 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: SA2312WE FAA Form 8110-2 (5/14) Page 3 of 3 Date of Issuance: February 12, 1971 Date Amended: April 02, 1971 Date of Reissuance: July 31, 2017 1. Stabilator up Limits have been revised to: 8½° ± 1° for the PA-30 15½° + 1° - 1½° for the PA-39 and the PA-30 C/R * 2. C. G. Limits above 3600 lbs. are: 3600 lbs. + 86.5 to + 92.0 inches aft of datum 3725 lbs. + 87.6 to + 91.2 inches aft of datum 3800 lbs. + 88.2 to + 91.0 inches aft of datum 3. When Brittain Model TT-5 wing tip tanks are installed, all weight in excess of 3650 lbs. must consist of symmetrically loaded fuel in the tip tanks 4. Robertson Aircraft FAA Approved AFM Supplement is required. 5. Vmc – Minimum Control Speed: 80 MPH (69 knots) for the PA-30 75 MPH (65 knots) for the PA-39 and the PA-30 C/R* The approval of this change in type design applies basically to the above model aircraft only. T his approval should not be extended to other aircraft of these models on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of these aircraft. *The PA-30 C/R is the PA-30 with contra rotating engines per Note 5 of Data Sheet A1EA dated 12 October 1970. -END- United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA2312WE FAA Form 8110-2 (5/14) Page 4 of 3 ## Every issue (2) - July 31, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/36/7d/367dc99a9342b03eb7f993e335d1352841e650c8b79044f3e6f82df8fd8fbdab) - September 8, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/56/a5/56a5405eae7d34ee5bcec5ccff3b8bc597737d9de95c228d61a95936674ba78c) --- 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.