# STC SA3947NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Bruce Aerospace Inc., United States
- Description: Installation of Floor Proximity Emergency Escape Path Marking System.
- Applied: March 16, 1988
- Status date: April 11, 2025
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 25
- Data sheets: [TCDS A20EA](https://openairdocs.org/tcds/A20EA)
- Certificate PDF: https://openairdocs.org/files/sha256/b5/88/b588cf2528fdfaaf3ee599f78219b5bfe143cafb13ee3a60d8efe91bb7971729
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID196070878820251229152005.0001
- DRS record last changed: December 29, 2025
- Page: https://openairdocs.org/stc/SA3947NM

## ADs that name it (0)

None.

## Approved models (5)

- Viking Air Limited DHC-7-1 ([TCDS A20EA](https://openairdocs.org/tcds/A20EA))
- Viking Air Limited DHC-7-100 ([TCDS A20EA](https://openairdocs.org/tcds/A20EA))
- Viking Air Limited DHC-7-101 ([TCDS A20EA](https://openairdocs.org/tcds/A20EA))
- Viking Air Limited DHC-7-102 ([TCDS A20EA](https://openairdocs.org/tcds/A20EA))
- Viking Air Limited DHC-7-103 ([TCDS A20EA](https://openairdocs.org/tcds/A20EA))

## 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.

SA3947NM Bruce Aerospace Inc.

580 Mallory Way Carson City, NV 89701 Part 25 Title 14 CFR A20EA Bombardier DHC-7-1, DHC-7-100, DHC-7-101, DHC-7-102, DHC-7-103 This system should not be incorporated in any aircraft unless it is determined that the interrelationship between this installation and any previously approved configuration will not introduce any adverse effect upon the airworthiness of the aircraft. This system has been determined to comply with the applicable airworthiness requirements with the following operative light assemblies: exit identifiers and/or flood lights – 2 bulbs operative, light track red modules – 50% operative (1 bulb in each 2 bulb group or 2 bulbs in each 4 bulb group), and light track clear and/or directional arrow modules – 50% operative with a maximum of 2 bulbs in a row out.

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.

03/16/1988 06/12/2008 04/11/2025 10/11/1988 for Manager West Certification Branch 2 Installation of Floor Proximity Emergency Escape Path Marking System in accordance with FAA approved Bruce Industries, Inc.

Master Drawing List MDL-DH-7, Revision B, dated June 13, 1988, or later FAA approved revisions.

SA3947NM 2

## Every issue (2)

- April 11, 2025: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/b5/88/b588cf2528fdfaaf3ee599f78219b5bfe143cafb13ee3a60d8efe91bb7971729)
- June 12, 2008: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/53/eb/53eb6e261599baa4eb387fd668eb5bfeb630b33629a05439b69c41429bc3727d)

---
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.