# STC SA3750NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Standard Aero, United States
- Description: Replacement of Honeywell attitude heading reference system (AHRS) with Honeywell lasertrak inertial reference system (IRS).
- Applied: August 21, 1987
- Status date: March 14, 2012
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A12EA](https://openairdocs.org/tcds/A12EA)
- Certificate PDF: https://openairdocs.org/files/sha256/51/51/51514904ea97209151a19693c585ca96400dd46d6ebf3c7084c3a829c8eba1b4
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/191F38D81D2310B3862579E9005E050E.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3750NM

## ADs that name it (0)

None.

## Approved models (1)

- Gulfstream Aerospace Corporation G-IV ([TCDS A12EA](https://openairdocs.org/tcds/A12EA))

## 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.

United States Of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate Number SA3750NM

This Certificate issued to

Part *25 of the Federal Aviation Regulations. *(For certification basis see Type Certificate Data Sheet A12EA.)

Description of Type Design Change: Installation of Honeywell (third) Inertial Reference Unit (IRU), Honeywell Lasertrak Navigation Display Unit and optional Skylight Course Deviation Indicator (CDI) in accordance with FAA approved Western Commander, Inc. Top Drawing No. 08000003 Revision N/C dated August 17, 1987, or later FAA approved revision. One of two Western Commander, Inc. Airplane Flight Manual Supplements (AFMS), is required as part of this installation. AFMS Document No. 08015001, FAA approved on November 6, 1987, or later FAA approved revision; or, if optional Skylight CDI installed, AFMS Document No. 08015003, FAA approved on September 1, 1988, or later FAA approved Revision.

Limitations and Conditions: The approval of change in type design applies to the above listed model airplanes only.

This approval should not be extended to 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 the aircraft. 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 : August 21, 1987

Date of issuance : November 12, 1987

Standard Aero 1200 North Airport Drive Springfield, IL 62707 A12EA

Gulfstream

G-IV Original Product Type Certificate Number :

Date reissued : December 20, 1994, July 30, 2003, March 14, 2012

Date amended September 7, 1988

( Signature) Haifa Haj-Eid Supervisor, Technical & Administrative Support Staff, Los Angeles Aircraft Certification Office

( Title)

## Every issue (2)

- March 14, 2012: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/51/51/51514904ea97209151a19693c585ca96400dd46d6ebf3c7084c3a829c8eba1b4)
- July 30, 2003: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/f6/fc/f6fc0fb51684b8dc9112d61424c860433985302d01524c1e0c189081b025c1f3)

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