# STC SA1613GL

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: USA Jet Airlines Inc., United States
- Description: Installation of Stage 3 hushkit when aircraft powered by (1) P&W JT8D7 series engines, (2) P&W JT8D-9 series engines.
- Applied: March 5, 1990
- Status date: March 27, 2002
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A6WE](https://openairdocs.org/tcds/A6WE)
- Certificate PDF: https://openairdocs.org/files/sha256/55/5e/555e21246f8a93e3cfb84a513635f4407b7b9360d77ade6144ecb986004a8918
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/32B9EF58C349696885256CC100821464.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1613GL

## ADs that name it (0)

None.

## Approved models (5)

- McDonnell Douglas Corporation DC-9-21 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-31 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-32 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-32F ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-33F ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))

## 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.

This Certificate issued to USA JET AIRLINES, INC.

**HANGAR 2064 D STREET**

WILLOW RUN AIRPORT BELLEVILLE, MICHIGAN 48111 Part 4b* of the Civil Air Regulations. (*See Type Certificate Data Sheet No. A6WE for complete certification basis.)

A6WE McDonnell Douglas DC-9 Description of Type Design Change : Installation of a Stage 3 Hush Kit on McDonnell Douglas DC-9-21, -31, - 32, -32F, and -33F aircraft when powered by: (1) Pra tt & Whitney JT8D-7 series e ngines in accordance with ABS Partnership Master Drawing List MDL-009-051-91, No Re vision, dated March 25, 1992, or later FAA approved revision; or, (2) Pratt & Whitney JT8D -9 series engines in accordance with ABS Partnership Mast er Drawing List MDL-009-001-90, Revision B, dated April 19, 1991, or later F AA approved revision. Salient features of these type design changes include respaced inlet guide vanes (RIGV) and tailpipe area of 5,055 sq. ft.

1. FAA approved Airplane Flight Manual Supplement (A FM) dated April 24, 1992, or later FAA approved revision is required with this modification when Pratt & Whitney JT8D-7 series engines are installed.

2. FAA approved AFM Supplement dated June 13, 1991, or later FAA approved revision is required with this modification when Pratt & Whitney JT8D-9 series engines are installed.

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. (See Page 3 for continuation)

Date of application : March 5, 1990

Date of issuance : June 13, 1991

Date reissued : March 27, 2002, December 24, 2003 August 1, 2008 Date amended : April 24, 1992, September 24, 1992, March 27, 1995

( Signature) Manager, Propulsion Branch Los Angeles Aircraft Certification Office ( Title)

NOTE:

**DO NOT DELETE THIS PAGE.**

**DO NOT ADD ANY DATA TO THIS PAGE.**

**THIS PAGE IS FOR PAGE NUMBERING PURPOSES, PLEASE DISCARD PRINTED COPY.**

Number SA1613GL

3. FAA approved “DC-9 Maintenance Manual Supplementa l Information” dated March 27, 1995, or later FAA approved revision is required with this modification for the model DC-9-21.

4. This approval should not be extended to other airc raft of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those previ ously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft.

-END-

## Every issue (1)

- March 27, 2002: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/55/5e/555e21246f8a93e3cfb84a513635f4407b7b9360d77ade6144ecb986004a8918)

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