# STC SA8000NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Dow Aero LLC, United States
- Description: Installation of World Auxiliary Power Company (WAPCO) lower forward cargo door airstair
- Applied: January 31, 1991
- Status date: February 5, 2015
- Product: Aircraft, Large Airplane
- Certification basis: Part 25
- Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE)
- Certificate PDF: https://openairdocs.org/files/sha256/eb/a7/eba767a6c3d984dc437177605f1bc982a03a9ba9843ffcf17c83fb61dfe8fe08
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID133443029720250401155240.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA8000NM

## ADs that name it (0)

None.

## Approved models (3)

- The Boeing Company 747-200B Series ([TCDS A20WE](https://openairdocs.org/tcds/A20WE))
- The Boeing Company 747-200C Series ([TCDS A20WE](https://openairdocs.org/tcds/A20WE))
- The Boeing Company 747-200F Series ([TCDS A20WE](https://openairdocs.org/tcds/A20WE))

## 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.

SA8000NM Dow Aero, LLC 6800 Camille Avenue Oklahoma City, OK 73149 Part 25 the Federal Aviation Regulations A20WE Boeing 747-200 Series

1. The installer must determine whether this design change is compatible with previously approved modifications.

2. 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.

01/31/1991 07/16/1997 01/05/2000 12/03/2001 06/15/1994 for Paul Nguyen Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 3 Installation of World Auxiliary Power Company (WAPCO) lower forward cargo door airstair in accordance with FAA Approved WAPCO Drawing List Number 1423-7400, Revision "C", dated July 24, 1992, or later FAA approved revision.

FAA 8110-2 ( 10/24) Page 2 of __

SA8000NM 03/13/2025 3

SA8000NM 03/13/2025 Date Reissued:

04/28/2008; 06/16/2014; 12/30/2014; 02/05/2015; 03/13/2025

-END- 3 3

## Every issue (5)

- February 5, 2015: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/eb/a7/eba767a6c3d984dc437177605f1bc982a03a9ba9843ffcf17c83fb61dfe8fe08)
- February 5, 2015: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/1a/6e/1a6e74d0e77bb1ec422f7fd1056572d5dddfdbec643427018a4f90782b3f0b93)
- December 30, 2014: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/d9/1a/d91a5f701b05d8d031063c1dc747c4b8227a2570767f1c9b98922c458f6e126a)
- June 16, 2014: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/3a/37/3a37cd09ccb7a80ef7698ada2bc48a46d815d1b8c6ee36b4fbeaa4aa41b366a3)
- April 28, 2008: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/4c/04/4c041cb250f10904cd5ac4edb2c18e7a0af7426710ed4fcfa55de7ab2b0f7658)

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