# STC SA2825CE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Teledyne Controls, United States
- Description: Installation of B&D Instruments & Avionics, Inc. Electronic N2 Gas Compressor Indicator.  Data required: (1) B&D Instruments & Avionics, Inc. Installation Manual Part No. 55006-003-011, Revision A, dated April 6, 1992, or later "FAA Approved" revision; and (2) copy of this certificate.
- Applied: February 14, 1992
- Status date: November 3, 2011
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS 4A25](https://openairdocs.org/tcds/4A25)
- Certificate PDF: https://openairdocs.org/files/sha256/2d/91/2d9150dfac4ce9973b5d89ef637fa03d2837f2acbbdf198db135390d30018195
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FA3A16D3D7D818F48625798E0053C014.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2825CE

## ADs that name it (0)

None.

## Approved models (6)

- The Boeing Company DC-8-71 ([TCDS 4A25](https://openairdocs.org/tcds/4A25))
- The Boeing Company DC-8-71F ([TCDS 4A25](https://openairdocs.org/tcds/4A25))
- The Boeing Company DC-8-72 ([TCDS 4A25](https://openairdocs.org/tcds/4A25))
- The Boeing Company DC-8-72F ([TCDS 4A25](https://openairdocs.org/tcds/4A25))
- The Boeing Company DC-8-73 ([TCDS 4A25](https://openairdocs.org/tcds/4A25))
- The Boeing Company DC-8-73F ([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: Teledyne Controls 501 Continental Blvd El Segundo, CA 90245

Part 25 of the Federal Aviation Regulations.

Original Product - Type Certificate Number : 4A25 Make: McDonnell Douglas Model: DC-8-71, -71F, -72, -72F, -73, -73F Description of Type Design Change:

Installation of B&D Instruments & Avionics, Inc. Electronic N2 Gas Compressor Indicator. Data required: (1) B&D Instruments & Avionics, Inc. Installation Manual Part No. 55006-003-011, Revision A, dated April 6, 1992, or later “FAA Approved” revision; and (2) copy of this certificate.

Model 55006-003 N2 Gas Compressor RPM Indicators may not be used in combination with other gas compressor RPM indicators, i.e. all four indicators in the airplane must be Model 55006-003 indicators. This approval should not be extended to other specific airplanes of these models on which other previously approved modifications are incorporated, unless it is determined that the interrelationship between this change and any of these other previously approved modifications will introduce no adverse effect upon the airworthiness of that airplane. 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.

Date of application : February 14, 1992 Date of issuance : April 23, 1992 Date reissued : January 5, 1998; October 2, 2000;

June 30, 2003; November 3, 2011 Date amended :

Original signed by Raymond Johnston

( Signature) Raymond N. Johnston Program Manager Wichita Aircraft Certification Office (Title)

## Every issue (1)

- November 3, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/2d/91/2d9150dfac4ce9973b5d89ef637fa03d2837f2acbbdf198db135390d30018195)

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