# STC ST09098AC-D - Type: Supplemental type certificate - Status: Current, Reissued - Holder: L3Harris Technologies Integrated Systems L.P., United States - Description: Replaces the existing retractable lower cargo bay stairs with a ramp incorporating a powered lift for the occupant. Approval is limited to a Boeing 747SP modified with STC SA7606SW. - Applied: June 24, 1997 - Status date: May 4, 2023 - Product: Aircraft, Large Airplane - Certification basis: Part 25 - Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE) - Certificate PDF: https://openairdocs.org/files/sha256/e3/14/e3145f48c0b05a58dd4e99824a98d328476f868ca750f92a6c8712d1015acf65 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID101151739820231011143822.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/ST09098AC-D ## ADs that name it (0) None. ## Approved models (1) - The Boeing Company 747SP Series ([TCDS A20WE](https://openairdocs.org/tcds/A20WE)) ## 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. Supplemental Type Certificate Number ST09098AC-D This certificate issued to: L3Harris Technologies Integrated Systems L.P. 7500 Maehr Road Waco, TX 76705 Part 25 of the Federal Aviation Regulations. Original Product Make: The Boeing Company Type Certificate Number: A20WE Model: 747 SP Replaces the existing retractable lower cargo bay stair with a ramp incorporating a powered lift for the occupant. The change is in accordance with Raytheon E-Systems, Inc. - Waco Drawing List 97020004-000, Section 2.1, Revision B, dated December 3, 1997 or later DAS approved revision. 1. The approval is limited to only a Boeing 747SP modified in accordance with STC SA7606SW. 2. Compatibility of this design change with previously approved modifications must be determined by the i nstaller. 3. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission. Date of Application: June 24, 1997 Date Reissued: April 30, 2002; May 4, 2023 Date of Issuance: December 4, 1997 Date Amended: April 1, 1998 By Direction of the Administrator Signature Title Loyd R. Hamilton ODA-750173-SW Administrator Possession of this Supplemental Type Cert ificate (STC) document by persons other than the STC holder does not constitute rights to the design data nor to alter an aircraft, aircraft engine, or propeller. Supplemental Type Certificate Number ST09098AC-D To (Name and address of transferee) From (Name and address of grantor) ## Every issue (1) - May 4, 2023: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e3/14/e3145f48c0b05a58dd4e99824a98d328476f868ca750f92a6c8712d1015acf65) --- 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.