# STC SH2543NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Air Services Intl, United States
- Description: Installation of Allison 250-C20B
- Applied: November 2, 1984
- Status date: November 2, 1984
- Product: Aircraft
- Certification basis: Part 21
- Data sheets: [TCDS H2SW](https://openairdocs.org/tcds/H2SW)
- Certificate PDF: https://openairdocs.org/files/sha256/8a/35/8a352e2495ef8918cfd8513f33e81e9f5cb6c5654f5276d1a32930bee7242f3b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/95726146D68546A2862579D6005FB2F4.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SH2543NM

## ADs that name it (0)

None.

## Approved models (1)

- Bell Helicopter Textron Canada Limited 206B ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

SH9284 WE United States of America 104/5 Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number SH2543NM This certificate issued to: Air Services International 7300 E. Evans Scottsdale, AZ 85260 Part O of the Civil Air

•Regulations.

Original Product -Iype berlificate Number: H25W Make: Bell Helicopter 206B Serial No. 714 Description of Type Design Change: Installation of Allison 250-C20B Turboshaft Engine into a Bell Helicopter Model 206B Jet Ranger II helicopter. FAA Approved Air Services International Flight Manual Supplement, dated December 5, 1984 or later FAA Approved revisions is required as part of this installation.

Limitations and Conditions: The approval of this change in Type Design applies to the above indicated serial numbered helicopter only. This approval should not be extended to other helicopters of this model. The Allison 250-C20B will be installed according to the Bell 206B Jet Ranger 11 Maintenance Manual. The Allison 250-C20B will be operated in a derated condition and restricted to the Allison 250-C20 parameters and performance limitations.

13, 1984 Date Amended:

FEDERAL AVIATION (Signature ) TOMINISTRATO Manager, Western Aircraft Certification Office (Title) 47 FAA FORM 8110-2 (10-68) Page 1 of 2

## Every issue (1)

- November 2, 1984: Issued, Current. [certificate](https://openairdocs.org/files/sha256/8a/35/8a352e2495ef8918cfd8513f33e81e9f5cb6c5654f5276d1a32930bee7242f3b)

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