# STC SA2442WE - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Sierra Industries Ltd., United States - Description: Installation of dual hydraulic pump. - Applied: August 26, 1971 - Status date: July 31, 2017 - Product: Aircraft, Small Airplane - Certification basis: Part 3, Part 21 - Data sheets: [TCDS 1A10](https://openairdocs.org/tcds/1A10) - Certificate PDF: https://openairdocs.org/files/sha256/75/61/7561ee90de30031de785de4c794555ed6e47c506fe27148e37d5f4ad9eafd6de - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CC69B266633A7C2E862587200051F4B3.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA2442WE ## ADs that name it (0) None. ## Approved models (3) - Piper Aircraft Inc. PA-23-235 ([TCDS 1A10](https://openairdocs.org/tcds/1A10)) - Piper Aircraft Inc. PA-23-250 ([TCDS 1A10](https://openairdocs.org/tcds/1A10)) - Piper Aircraft Inc. PA-E23-250 ([TCDS 1A10](https://openairdocs.org/tcds/1A10)) ## 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: SA2442WE Part 3 of the Civil Air Regulations, dated 1 November 1949, Amendments 3-1 to 3-9 and 3.242(a) of Amendment 3-14 dated 13 March 1956. Original Product – Type Certificate Number: 1A10 Make: Piper Model: PA 23-250, PA-23-235 and PA E23-250 Dual hydraulic pump installation on Piper PA 23 aircraft in accordance with drawings called out in Robertson Aircraft sealed Drawing List No. 20H. New Eastern Industries hydraulic pump 1233- HNG Type 311 is installed on the right engine and pump 1233-HNG Type 311 replaces existing pump on left engine. FAA Approved Robertson Aircraft Flight Manual Supplement 20H-1 dated 12 November 1971 is required. Date of Application: August 26, 1971 Date Reissued: 11/8/84; 10/10/86; 9/8/05; 7/31/17 Date of Issuance: November 12, 1971 Date Amended: March 29, 1972 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: SA2442WE 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: SA2442WE FAA Form 8110-2 (5/14) Page 3 of 3 Date of Issuance: November 12, 1971 Date Amended: March 29, 1972 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 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. A copy of this c ertificate shall be maintained as part of the permanent records for each aircraft so modified. -END- United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA2442WE FAA Form 8110-2 (5/14) Page 4 of 3 ## Every issue (2) - July 31, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/75/61/7561ee90de30031de785de4c794555ed6e47c506fe27148e37d5f4ad9eafd6de) - September 8, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/a8/3f/a83fe75180657e2531ff38a04b9773d7a4a93b42a35c3996fbbd6ae24ec7f315) --- 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.