# STC SA08998SC

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: STC Engineering Company, United States
- Description: Installation of Pratt & Whitney Canada PT6A-42 engines.
- Applied: April 18, 1990
- Status date: November 2, 2011
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21, Part 23
- Data sheets: [TCDS A31CE](https://openairdocs.org/tcds/A31CE)
- Certificate PDF: https://openairdocs.org/files/sha256/e8/29/e829705c2f66340bf9ad7639754ef4514f1033395caec23237aa6b5ea20e7eac
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/72BA0224570585588625794F004E6EB5.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA08998SC

## ADs that name it (0)

None.

## Approved models (1)

- Hawker Beechcraft Corporation F90 ([TCDS A31CE](https://openairdocs.org/tcds/A31CE))

## 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.

Part 23 of the Federal Aviation Regulations.

Description of Type Design Change: Installation of Pratt & Whitney Canada PT6A-42 engines per STC Engineering Drawing List No. DL92005, Rev. 13, dated April 12, 1995, or later FAA approved revisions. Also, installation of full turning contoured engine exhaust stacks in accordance with STC Engineering Co. Drawing List DL93005, Rev. 3, dated July 1, 1994, or later FAA approved revisions.

Limitations and Conditions: The installer must determine whether this design change is compatible with previously approved modifications. 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. FAA approved Airplane Flight Manual Supplement dated May 10, 1995, or later approved revision is required. Only for airplane Serial Nos. LA-2 thru LA- 204, except Serial No. LA-202.

STC Engineering Company 32340 South Skyline Drive Cookston, Oklahoma 74427 A31CE Make: Beech Model: F90 Date of application: April 18, 1990

Date of issuance: April 12, 1995

Date reissued: October 30, 2007; November 19, 2008;

November 2, 2011

Date amended: April 18, 1996

( Signature) S. Frances Cox, Manager Special Certification Office, Southwest Region

(Title)

## Every issue (1)

- November 2, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e8/29/e829705c2f66340bf9ad7639754ef4514f1033395caec23237aa6b5ea20e7eac)

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