# STC ST09853SC

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: NASA Johnson Space Center, United States
- Description: Installation of modified compass heading switching system.
- Applied: February 21, 2001
- Status date: February 21, 2001
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A12EA](https://openairdocs.org/tcds/A12EA)
- Certificate PDF: https://openairdocs.org/files/sha256/60/c5/60c58ae3f5d15f030473725971baa5b7c5d42ad4fe8fd39871cc23c213629460
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/57C6F4A1C406A6E285256CC300035ECE.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST09853SC

## ADs that name it (0)

None.

## Approved models (1)

- Gulfstream Aerospace Corporation G-1159 ([TCDS A12EA](https://openairdocs.org/tcds/A12EA))

## What the certificate says

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

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate FroJect No. S165005C-T (JDH) Number: ST093535C This certificate issued to: NASA Johnson Space Center Aircraft Operations Division 2101 NASA Rd. 1 Houston, TX 77058 Part 4b of the Civil Air Regulations.

Original Product Type Certificate Number: A12EA Make: Gulfstream Model: G-1159 Description of Type Design Change: Installation of modified compass heading switching system in accordance with NASA Johnson Space Center Drawing No. 2075058, Revision B, dated February 21, 2001, or later FAA approved revision. FAA approved Airplane Flight Manual Supplement Document No. 20-061697-1C, Revision IR, dated February 14, 2001, or later FAA approved revision is required.

Limitations and Conditions: Compatibility of this design change with previously approved modifications must be determined by the installer. 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: October 13, 2000 Date Reissued:

Date of Issuance: February 21, 2001 Date Amended:

FEDERAL AVIATION By Direction of the Administrator Rich aug ignatu S. Frances Cox TOMNISTRATO Manager, Special Certification Office Southwest Region (Title)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number_ to (Name of transferee) (Address of transferee) (Number and street) (City, State, and ZIP code) from (Name of grantor) (Print or type) (Address of grantor) (Number & street) (City, State, and ZIP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- February 21, 2001: Issued, Current. [certificate](https://openairdocs.org/files/sha256/60/c5/60c58ae3f5d15f030473725971baa5b7c5d42ad4fe8fd39871cc23c213629460)

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