# STC SA117AL - Type: Supplemental type certificate - Status: Current, Amended - Holder: Airglas Inc., United States - Description: Installation of Cunningham auxiliary fuel belly tank. - Applied: January 16, 1965 - Status date: August 14, 2012 - Product: Aircraft, Small Airplane - Certification basis: Part 3, Part 21 - Data sheets: [TCDS 1A2](https://openairdocs.org/tcds/1A2) - Certificate PDF: https://openairdocs.org/files/sha256/77/98/77986d21f9d88c8bf39b8e79443667737a5b42e8f1bf7f40701e288c81e57dff - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9EE8AFC0652AAEF486257EC0005EAED6.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA117AL ## ADs that name it (0) None. ## Approved models (11) - Piper Aircraft Inc. PA-18-125 (Army L-21A) ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18-135 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18A ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18A-135 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18A-150 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18AS-125 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18AS-135 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18AS-150 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18S-125 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18S-135 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18S-150 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) ## 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. This Certificate issued to Part 3 of the Civil Air Regulations Description of Type Design Change: Installation of Cunningham Auxiliary Fuel Belly Tank (Airglas Engineering Co., Inc. P/N LT32PA-18) in accordance with Alaska Air Guides, Inc. Installation Instructions (Pages 1 through 6) revised September 16, 1968. Limitations and Conditions: Airplanes incorporating this design change must be operated in the Normal Category only, and must be equipped with sight gauge type fuel quantity indicators. Landplanes incorporating this design change must be equipped with wheel/tire or ski installations which position the main landing gear axle’s centerlines at least 9 3/8 inches above the ground or bottoms of the skis. Piper PA-18A series airplanes incorporating this design change must have cabin floorboards and a rear seat installation modified to PA-18 series configuration in accordance with FAA approved data. 3500 O’Malley Rd Anchorage, AK 99507 Date reissued : September 1, 1977; August 14, 2012 Date amended : January 4, 1966; September 16, 1968; June 30, 1997 (Signature) August A. Asay Manager, Anchorage Aircraft Certification Office (Title) Date of application : January 16, 1965 Date of issuance : February 26, 1965 1A2 Piper PA-18 “125”, PA-18A, PA-18S “125”, PA-18AS “125”, PA-18 “135”, PA-18A “135”, PA-18S “135”, PA-18AS “135”, PA-18 “135”, PA-18A “150”, PA-18S “150”, and PA-18AS “150” See continuation sheet 3 of 3 FAA Form 8110-2-1(10-69) Page 3 of 3 Number SA117AL Date of Amendment: June 30, 1997 Piper Models PA-18A, PA-18 “125”, PA-18A “125”, and PA-18AS “125” incorporating this design change must have a right wing fuel tank and header tank installed in accordance with Item 102 of Type Certificate Data Sheet (TCDS) No. 1A2, Revision 35 Piper Models PA-18S “125”, PA-18AS “125”, PA-18S “135”, and PA-18AS “135” incorporating this design change must have EDO 89-2000 floats installed in accordance with Item 209(b) of Type Certificate Data Sheet (TCDS) 1A2, Revision 35. Compatibility of this design change with previously approved modifications must be determined by the installer. Land/skiplanes incorporating this design change must be operated in accordance with Alaska Air Guides, Inc. FAA Approved Airplane Flight Manual Suplement, dated January 4, 1966, or Airglas Engineering Co. Inc. FAA Approved Airplane Flight Manual Supplement, dated June 30, 1997, or later FAA approved revision, which is a required part of this installation. Seaplanes incorporating this design change must be operated in accordance with Alaska Air Guides, Inc. FAA approved Airplane Flight Manual Supplement, dated September 16, 1968, or Airglas Engineering Co., Inc. FAA Approved Airplane Flight Manual Supplement, dated June 30, 1997, or later FAA approved revision, which is a required part of this installation. ## Every issue (1) - August 14, 2012: Amended, Current. [certificate](https://openairdocs.org/files/sha256/77/98/77986d21f9d88c8bf39b8e79443667737a5b42e8f1bf7f40701e288c81e57dff) --- 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.