# STC SA3405WE - Type: Supplemental type certificate - Status: Current, Reissued - Holder: ROCKY TOP LEASING INC., United States - Description: Installation of fuselage fuel tank in accordance with MR. RPM Top Drawing 57031, Revision E dated May 16, 1977, or later FAA approved revisions. - Applied: December 8, 1976 - Status date: November 7, 2008 - Product: Aircraft, Small Multi-Engine - Certification basis: Part 3, Part 21 - Data sheets: [TCDS 2A4](https://openairdocs.org/tcds/2A4) - Certificate PDF: https://openairdocs.org/files/sha256/7b/82/7b8256e042bf12ec723ce1d1bc21b9925bce3ca2da864b59cb362eca31032253 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AB78B101C73222E786257500004E5A7F.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA3405WE ## ADs that name it (0) None. ## Approved models (3) - Twin Commander Aircraft Corporation 560-F ([TCDS 2A4](https://openairdocs.org/tcds/2A4)) - Twin Commander Aircraft Corporation 680 ([TCDS 2A4](https://openairdocs.org/tcds/2A4)) - Twin Commander Aircraft Corporation 680-F ([TCDS 2A4](https://openairdocs.org/tcds/2A4)) ## 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 ROCKY TOP LEASING, INC. 1027 River Bend Drive Chattanooga, TN 37419 Part 3 of the Civil Air Regulations. 2A4 Aero Commander 560F, 680, 680F Description of Type Design Change : Installation of fuselage fuel tank in accordance with MR. RPM Top Drawing 57031, Revision E dated May 16, 1977, or later FAA approved revisions. FAA approved Mr. RPM Flight Manual Supplem ent dated May 24, 1977, or later FAA approved revisions, is required with this installation. Limitations and Conditions : The approval of this change in type design applies basically to Aero Commander Models 560F, 680, 680F only. This a pproval should not be extended to other specific airplanes of this model on which ot her previously approved modifications are incorporated unless it is determined that the in terrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that airplane. If the holder agrees to permit anot her person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission. Date of application : December 8, 1976 Date of issuance : May 24, 1977 Date reissued : April 8, 2004, November 7, 2008 ( Signature) Manager, Propulsion Branch Los Angeles Aircraft Certification Office ( Title) NOTE: **DO NOT DELETE THIS PAGE.** **DO NOT ADD ANY DATA TO THIS PAGE.** **THIS PAGE IS FOR PAGE NUMBERING PURPOSES, PLEASE DISCARD PRINTED COPY.** Number (STC No.) ## Every issue (2) - November 7, 2008: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/7b/82/7b8256e042bf12ec723ce1d1bc21b9925bce3ca2da864b59cb362eca31032253) - April 8, 2004: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/4b/f8/4bf87cf5b6b751e043201c047e2ecb4432a70d085068116e4c1a9ae385d52c3b) --- 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.