# STC SA4225WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Airweld Inc, United States
- Description: Installation of 1 or 2 AiResearch GTCP85-98CK auxiliary power units in forward baggage compartment.
- Applied: December 28, 1979
- Status date: April 28, 2008
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A25](https://openairdocs.org/tcds/4A25)
- Certificate PDF: https://openairdocs.org/files/sha256/9f/3e/9f3e8b8b841b1aff0bbaad4497129544d883e2bdea125e946d45c1962c157961
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0CA36CFEFE17933D862574480077744C.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4225WE

## ADs that name it (0)

None.

## Approved models (6)

- McDonnell Douglas Corporation DC-8-52 ([TCDS 4A25](https://openairdocs.org/tcds/4A25))
- McDonnell Douglas Corporation DC-8-62 ([TCDS 4A25](https://openairdocs.org/tcds/4A25))
- McDonnell Douglas Corporation DC-8-62F ([TCDS 4A25](https://openairdocs.org/tcds/4A25))
- McDonnell Douglas Corporation DC-8-63F ([TCDS 4A25](https://openairdocs.org/tcds/4A25))
- McDonnell Douglas Corporation DC-8-71 ([TCDS 4A25](https://openairdocs.org/tcds/4A25))
- McDonnell Douglas Corporation DC-8-72F ([TCDS 4A25](https://openairdocs.org/tcds/4A25))

## 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 AIRWELD, INC.

8167 BELVEDERE AVENUE, SUITE D SACRAMENTO, CALIFORNIA 95826 Part 4b* of the Civil Air Regulations. *Certification basis is set forth in Type Certificate Data Sheet 4A25, Revision 31 as revised on March 19, 1985 Original Product Type Certificate Number :

4A25 McDonnell Douglas

**see Page 3 Description of Type Design Change : Installation of one (1) or two (2) AiResearch GTCP85-98CK Auxiliary Power Units (APU) in the forward bagga ge compartment in accordance with FAA Approved World Airways, Inc., Drawing List No. 498000. An FAA Approved World Airway, Inc., Airplane Flight Manual Supplement is also required as part of this inst allation. The identification and revision levels of these documents are as noted on **Page 3 for the affected aircraft models.

Limitations and Conditions: The approval is for ground operation only. The approval of this change in type design applies to the models listed on **Page 3 only. This approval should not be extended to the other specific aircraft of these models on which othe r previously approved modification are incorporated unless it determined by the installer that the interrela tionship between this change and any of those other previously approved modifications w ill introduce no adverse effect upon the airworthiness of that aircraft.

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 Continuation Sheet Page 3)

Date of application : December 28, 1979

Date of issuance : September 19, 1980

Date reissued : May 27, 1988; July 16, 1997;

January 5, 2000; December 3, 2001; April 28, 2008

Date amended : see Page 3

( 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 SA4225WE

Date of Application: December 28, 1979 Date of Issuance: September 19, 1980 Date Reissued: May 27, 1988, July 16, 1977, January 5, 2007, December 3, 2001, April 28, 2008

**Model Continued:

Date

Model

Drawing List 498000 Rev.

(Cont)

Douglas Flight Manual

World Airways, Inc.

AFM Supplement No., Date

Orig. STD DC-8-63F “E” (-101) DAC-33163 498-2-09/18/80

04/30/81 DC-8-52 “F” (-103) LB-30757 498-2-09/18/80

01/20/83 DC-8-62F “N” (-105) DAC-33162 498-8FA-01/18/83

01/20/83 DC-9-72F “N” (-105) DAC-33162, App.17 498-8FA-01/18/83

12/04/89 DC-8-62 “V” (-107) DAC-33162 498-8FA-11/01/89

01/02/91 DC-8-71 “W” (-109) DAC-33161 498-8FA-12/05/90

10/25/94 DC-8-63F “Y” (-111) DAC-33163 498-8FA-10/12/94

11/01/94 DC-8-62F “Z” (-113) DAC-33162 498-8FA-10/12/94

NOTE: The above listed documents are “or later FAA approved revisions.”

-END-

## Every issue (1)

- April 28, 2008: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/9f/3e/9f3e8b8b841b1aff0bbaad4497129544d883e2bdea125e946d45c1962c157961)

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