What it approves
Installation of 2nd oil cooler.
What the certificate says
From the PDF’s text layer, without the form’s printed wording. Layout and order may differ; the PDF is the record.
SH4983NM Turbolyft USA Corporation 9230 Highway 279 Brownwood, TX 76801 Part 27 Title 14 CFR H9EU Airbus Helicopters AS350B, AS350BA, AS350B1, AS350B2, and AS350B3 Approval of this change in type design applies to the above model rotorcraft 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.
07/16/1990 09/29/2014 10/28/2015 11/16/2018 10/04/1990 01/30/1991 06/22/1993 01/18/2000 ✔ for Manager, West Certification Branch 3 Installation of 2nd oil cooler in accordance with Geneva Aviation Master Drawing List GA138, Revision D, dated June 18, 1999, or later Federal Aviation Administration approved revision.
SH4983NM 05/11/2026 3
SH4983NM 05/11/2026 Date Reissued: 5/20/2022; 4/17/2024; 5/11/2026 Date Amended: 2/20/2014
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ADs that name this STC · 0
An AD can apply because an STC is installed, or mention one in its text.
Approved models · 5
Every issue · 8
DRS keeps each issue of an STC as its own record, with its own certificate and attachments.
| Date | Status | Files |
|---|---|---|
| May 11, 2026 | Reissued, current | Certificate |
| April 17, 2024 | Reissued, earlier issue | Certificate |
| May 20, 2022 | Reissued, earlier issue | Certificate |
| November 16, 2018 | Reissued, earlier issue | Certificate |
| October 28, 2015 | Reissued, earlier issue | Certificate |
| September 29, 2014 | Reissued, earlier issue | Certificate |
| February 20, 2014 | Amended, earlier issue | Certificate |
| January 18, 2000 | Amended, earlier issue | Certificate |