# STC SH4791NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Turbolyft USA Corporation, United States
- Description: Installation of a Geneva Aviation Starter Generator,
- Applied: October 25, 1989
- Status date: May 11, 2026
- Product: Aircraft, Rotorcraft
- Certification basis: Part 27
- Data sheets: [TCDS H9EU](https://openairdocs.org/tcds/H9EU)
- Certificate PDF: https://openairdocs.org/files/sha256/81/8a/818a9bc28aeb50679a073540b0fd1ced37a908ad02cc49fcd03e4af124d56835
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID103510221320260714152322.0001
- DRS record last changed: July 14, 2026
- Page: https://openairdocs.org/stc/SH4791NM

## ADs that name it (0)

None.

## Approved models (4)

- Airbus Helicopters AS-350B ([TCDS H9EU](https://openairdocs.org/tcds/H9EU))
- Airbus Helicopters AS-350B1 ([TCDS H9EU](https://openairdocs.org/tcds/H9EU))
- Airbus Helicopters AS-350B2 ([TCDS H9EU](https://openairdocs.org/tcds/H9EU))
- Airbus Helicopters AS-350BA ([TCDS H9EU](https://openairdocs.org/tcds/H9EU))

## 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.

SH4791NM Turbolyft USA Corporation 9230 Highway 279 Brownwood, TX 76801 Part 27 Title 14 CFR H9EU Airbus Helicopters AS350B, AS350BA, AS350B1, and AS350B2 Approval of this change in type design applies to the above model rotorcraft with the Arriel 1B, 1D, or 1D1 engine only. This approval should not be extended to other rotorcraft of this model on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any of those other changes in type design, will introduce no adverse effect upon the airworthiness of that rotorcraft. A copy of this certificate and the MDL must be maintained as part of the permanent records for the modified rotorcraft.

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.

10/25/1989 09/29/2014 10/28/2015 11/16/2018 02/12/1990 06/17/1993 02/20/2014 ✔ for Manager, West Certification Branch 3 Installation of a Geneva Aviation Starter Generator, Part Number GA130-8 in accordance with Geneva Aviation Master Drawing List GA130, Revision B, dated June 11, 1993, or later Federal Aviation Administration approved revision.

SH4791NM 05/11/2026 3

SH4791NM 05/11/2026 Date Reissued: 5/20/2022; 4/17/2024; 5/11/2026

-----------------------End-----------------------

## Every issue (8)

- May 11, 2026: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/81/8a/818a9bc28aeb50679a073540b0fd1ced37a908ad02cc49fcd03e4af124d56835)
- April 17, 2024: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/fa/d1/fad165ca3048e462df283fa161fc3d45c1ebf344bfeda3983e1b04d95707f1ca)
- May 20, 2022: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/0d/4d/0d4de2bdac6d8370a4a25a32a8d8a15c796c1030bdb1ffa51c486a01d3231306)
- November 16, 2018: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/a0/d4/a0d4835a463253394bdf17b32c958153222696f0d32f00f6ff4eeff4aa1f3c2a)
- October 28, 2015: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/0b/7c/0b7c85bbbbb4789e5dd07331c8704ab2a2281a6efa946f3d13a7728c5c356589)
- September 29, 2014: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/7b/52/7b52b9c6e5993531208febe1dd6bae0ccc6538509d025eb57d603a35f24c1b71)
- February 20, 2014: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/2a/d4/2ad4b4c9d2f025d06991f42b438653bf409b5341d13643a3609f790127c42e67)
- June 17, 1993: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/2a/d4/2ad4b4c9d2f025d06991f42b438653bf409b5341d13643a3609f790127c42e67)

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