# STC SA3927NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Bruce Aerospace Inc., United States
- Description: Installation of floor proximity emergency escape path marking system.
- Applied: May 19, 1988
- Status date: April 11, 2025
- Product: Aircraft, Large Multi-Engine
- Data sheets: [TCDS 4A21](https://openairdocs.org/tcds/4A21), [TCDS 4A26](https://openairdocs.org/tcds/4A26)
- Certificate PDF: https://openairdocs.org/files/sha256/1b/cd/1bcd476624201bd3b24fbd9b3c8ae7aa564e22e6b51546c286632d102cd90eb4
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID125260822220251229151839.0001
- DRS record last changed: December 29, 2025
- Page: https://openairdocs.org/stc/SA3927NM

## ADs that name it (0)

None.

## Approved models (8)

- The Boeing Company 707-100 Long Body ([TCDS 4A21](https://openairdocs.org/tcds/4A21))
- The Boeing Company 707-100B Long Body ([TCDS 4A21](https://openairdocs.org/tcds/4A21))
- The Boeing Company 707-100B Short Body ([TCDS 4A21](https://openairdocs.org/tcds/4A21))
- The Boeing Company 707-200 ([TCDS 4A21](https://openairdocs.org/tcds/4A21))
- The Boeing Company 707-300 Series ([TCDS 4A26](https://openairdocs.org/tcds/4A26))
- The Boeing Company 707-300B Series ([TCDS 4A26](https://openairdocs.org/tcds/4A26))
- The Boeing Company 707-300C Series ([TCDS 4A26](https://openairdocs.org/tcds/4A26))
- The Boeing Company 707-400 Series ([TCDS 4A26](https://openairdocs.org/tcds/4A26))

## 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.

SA3927NM Bruce Aerospace Inc.

580 Mallory Way Carson City, NV 89701 Part 4b Civil Air Regulations 4A21 Boeing Company 707 The 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 – two 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 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.

05/19/1988 05/07/2008 04/11/2025 08/02/1988 for Manager West Certification Branch 2 Installation of floor proximity emergency escape path marking system in accordance with Bruce Industries, Inc. Master Drawling List MDL-707 Revision V, dated May 19, 1988, or later FAA approved revisions.

SA3927NM 2

## Every issue (2)

- April 11, 2025: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/1b/cd/1bcd476624201bd3b24fbd9b3c8ae7aa564e22e6b51546c286632d102cd90eb4)
- May 7, 2008: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/d9/c7/d9c7c6dbdf28679615dbeb2c49958f4638fca67c68d868fcad02daa453475413)

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