# STC SS05290AT

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Skyship Services Inc., United States
- Description: Replacement of existing Porsche engine and associated drive system with Lycoming Textron IO-540-L1C5 engines mated to shrouded MT Propeller Model MTV-25-2-D-C-R(M)/CFR170-23 propellers
- Applied: January 10, 2000
- Status date: February 17, 2014
- Product: Aircraft, Airship
- Certification basis: Part 21
- Data sheets: [TCDS AS1EU](https://openairdocs.org/tcds/AS1EU)
- Certificate PDF: https://openairdocs.org/files/sha256/c7/07/c707ca437c54f3965a1674df6dba3656396cf35c0cb1ab29f394be5e0b8bba91
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/546CEC9F22E13D8B86257CC2005DF597.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SS05290AT

## ADs that name it (0)

None.

## Approved models (1)

- Global Skyship Industries Inc. Skyship 600 ([TCDS AS1EU](https://openairdocs.org/tcds/AS1EU))

## 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(10-68) PAGE 1 of 1 PAGES SS05290AT Reissued on May 25, 2011 to supersede the original STC which is lost, misplaced, or destroyed.

21 Federal Aviation

Replacement of existing Porsche engine and associated drive system with Lycoming Textron IO-540-L1C5 engines mated to shrouded MT Propeller Model MTV-25-2-D-C-R(M)/CFR170-23 propellers as defined by Master Document List 220-72-00, Revision B, dated August 2002, or later FAA Approved revision. Skycruiser Airships’ Flight Manual Supplement AMS/2, dated December 10, 2002, or later FAA Approved revision, is required for this modification.

This approval should not be extended to other airplanes of this model 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 that aircraft. 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.

Skyship Systems, Inc.

2295 S. Hiawassee Road, Ste 411 Orlando, FL 32835 AS1EU Global Skyship Industries, Inc Model 600 January 12, 2000

December 10, 2002 May 25, 2011, April 23, 2012 February 17, 2014

(Signature) Melvin D. Taylor, Manager Atlanta Aircraft Certification Office

(Title)

## Every issue (2)

- February 17, 2014: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/c7/07/c707ca437c54f3965a1674df6dba3656396cf35c0cb1ab29f394be5e0b8bba91)
- April 23, 2012: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/5b/6a/5b6ae11f616c27f8a452d14f359e9ddd9b4f08b66adfb284785f9d412b967d1b)

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