# STC SA2790NM-D

- Type: Supplemental type certificate
- Status: Historical, Surrendered
- Holder: United Air Lines Inc, United States
- Description: Installation of full provisions for a Collins radio traffic alert and collision avoidance system (TCAS II) and a fully operational dual Colins Radio Mode S Transponder system.
- Applied: May 1, 1991
- Status date: June 29, 2009
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 25
- Data sheets: [TCDS A22WE](https://openairdocs.org/tcds/A22WE)
- Certificate PDF: https://openairdocs.org/files/sha256/5b/9b/5b9beebe5db95a51ab287cd70bdbbeea59c3cb29ce98921d98e93cb9693c503d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/00874A170FA9EE5C862577DC0072717A.0001
- DRS record last changed: June 23, 2026
- Page: https://openairdocs.org/stc/SA2790NM-D

## ADs that name it (0)

None.

## Approved models (1)

- McDonnell Douglas Corporation DC-10-30 ([TCDS A22WE](https://openairdocs.org/tcds/A22WE))

## What the certificate says

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

United States of America Supplemental Type CertificatURRENDERED Department of Transportation Federal Aviation Administration on 6-226 Certificate 2009 Number 5A2790N4-D This certificate issued to: UNITED AIRLINES, INC.

Part 25 of the Federal Aviation Pugulaliona. ( See Type Certificate Data Sheet A22WE for Special Conditions ).

Original Product - Type bertificate Number: A22WE Make: McDonnel1-Douglas Model: DC10-30 Description of Type Design Change: Installation of full provisions for a Collins Radio Traffic Alert and Collision Avoidance System (TCAS II) and a fully operational dual Collins Radio Mode S Transponder System, in accordance with United Airlines DAS 1 WE Approved Drawing List 2790 dated May 20, 1991 or later approved revisions.

United Airlines AFM Supplement to FAA Approved Flight Manual No. MDC-J5830 dated May 20, 1991, or later approved revisions, is required as part of this modification.

timilationsandbindilions: This approval does not extend to other aircraft 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 other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft.

line R. M. Casterline (Signature) TO MINISTRATIO DAS Staff Coordinator United Airlines DAS 1 WE (Title)

47.

## Every issue (1)

- June 29, 2009: Surrendered, Historical. [certificate](https://openairdocs.org/files/sha256/5b/9b/5b9beebe5db95a51ab287cd70bdbbeea59c3cb29ce98921d98e93cb9693c503d)

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