# STC SH7962SW-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Diamond Upgrades, LLC, United States
- Description: Installation of two Allison 250-C20R engines and enhanced antitorque system.
- Applied: January 24, 1989
- Status date: April 17, 2013
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21, Part 27
- Data sheets: [TCDS H11EU](https://openairdocs.org/tcds/H11EU)
- Certificate PDF: https://openairdocs.org/files/sha256/98/c5/98c5e24b3620a570160da63310a5c27657925af6bc2b2d1d37705d0c01b0cd02
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1BCE00C1F5FFC6DC86257B9D00622ACD.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH7962SW-D

## ADs that name it (0)

None.

## Approved models (1)

- Eurocopter France AS355F2 ([TCDS H11EU](https://openairdocs.org/tcds/H11EU))

## 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.

N umber SH7962SW-D This certificate issued to

Par t 27 of the Federal Aviation R egulations.

Original Product Type Certificate N umber:

M ake:

M odel:

Installation of two Allison 250-C20R engines and enhanced antitorque system in accordance with AHC Drawing List 355A82-1755 Revision G dated October 06, 2008, or later FAA approved revision.

1. Rotorcraft Flight Manual Supplement 355FMS-011, dated October 06, 2008, or later approved revision is required.

2. The Installer must determine whether this design change is compatible with previously approved modifications.

3. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission

Diamond Upgrades LLC 1 Rodney Square 920 N. King Street Wilmington, DE 19801

H11EU Eurocopter France AS355F2 Date of application : January 24, 1989

Date of issuance : February 01, 1991 Date reis sued: August 01, 1997, June 30, 2003, February 01, 2006, April 17, 2013

Date amended : January 28, 2009

B y direction of the A dministrator

(Signature) Gaetano Sciortino Manager New York Aircraft Certification Office

(Title)

## Every issue (2)

- April 17, 2013: Amended, Current. [certificate](https://openairdocs.org/files/sha256/98/c5/98c5e24b3620a570160da63310a5c27657925af6bc2b2d1d37705d0c01b0cd02)
- January 28, 2009: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/57/f4/57f4218cbdfa54d9cc8b2ca74941700f03b97aaffaa84a2af736a7be79469e82)

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