# STC SA4148SW - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Sierra Industries, Inc - Description: Installation of Dual Collins AL101 Radio Altimeter Systems, Category I operation. - Status date: December 1, 1999 - Data sheets: 4A21 - Certificate PDF: https://openairdocs.org/files/sha256/f5/5e/f55e39ca8d0a977eeb2f76c3d9a810f979c84ad8ddcf7346305ea58b066c1f69 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1DAA8C8893FABB7B85256CC2000E39DB.0001 - Page: https://openairdocs.org/stc/SA4148SW ## ADs that name it None. ## Approved models (1) - The Boeing Company 707-100 Long Body (TCDS 4A21) ## 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. of - Jlfefrmil ^fetation jAfcmmteiratum : OLerttftcate SA4148SW Sierra Industries, Inc., a Texas Corporation Garner Field Road Uvalde, TX 78801 4b Civil Air Boeing 707-100 Series Installation of Dual Collins AL101 Radio Altimeter Systems, Category I operation, according to Drawing List 45-1 dated 4/17/80, or later FAA approved revision. FAA Approved Airplane Flight Manual Supplement dated July 2, 1980, is required. Compatibility of this modification with other previously approved modifications must be determined by the installer. a- /Setminee&an aftzJe i& .• June 11, 1979 July 02, 1980 '.- December 1, 1999 (Signature) Michele M. Owsley, Manager Airplane Certification Office, Southwest Region (Title) TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street j (City, State, and