# STC SA2549NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Tower Avionics Center, United States
- Description: Installation of Howell Electric engine torque indicators.
- Applied: October 29, 1984
- Status date: December 21, 1984
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A7CE](https://openairdocs.org/tcds/A7CE)
- Certificate PDF: https://openairdocs.org/files/sha256/ea/f8/eaf8f356e4619a3caf5fa0af6b8c3f72008e2803da66f0412c987133419ecf5b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EB3587845EC7EC9285256CC200015FA4.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2549NM

## ADs that name it (0)

None.

## Approved models (1)

- The Cessna Aircraft Company 425 ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))

## What the certificate says

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

SA 9262WE United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA2549MM This certificate issued to: Tower Avionics Center Hangar 8 Oakland Intl Airport Oakland CA 94614 Purt 3 of the Civil Air Regulations: Dated May 15, 1956 Original Product Type berlificate Number: ATCE Make: Cessna Model: 425 Description of Type Design Change: Installation of a Howel1 Electric Engine Torque Indicators in accordance with Tower Avionics Report No. 425-130432 Rev. C, dated December 20, 1984 or later FAA sealed revision.

Limitations and Conditions: The approval of this change in type design applies to the basic aircraft of the specified model that is otherwise unmodified. This approval should not be extended 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 on the airworthiness of that aircraft.

December 21, 1984 Date Amended:

FEDERAL AVIATION By Direction of the Administrator туктаварта - .

TOMINISTRADE Manager, Western Aircraft Certification Office (Title)

## Every issue (1)

- December 21, 1984: Issued, Current. [certificate](https://openairdocs.org/files/sha256/ea/f8/eaf8f356e4619a3caf5fa0af6b8c3f72008e2803da66f0412c987133419ecf5b)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.