# STC SA91NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Schroers R J, United States
- Description: Installation of strobe light system with flashtube system
- Applied: October 2, 1973
- Status date: March 11, 1974
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-767](https://openairdocs.org/tcds/A-767)
- Certificate PDF: https://openairdocs.org/files/sha256/6b/35/6b358361614ee2cb308deb423de7a424710472654dc601b2c913498a951cc0af
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8AD80A1848511D4586257AE100514AD6.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA91NW

## ADs that name it (0)

None.

## Approved models (1)

- Univair Aircraft Corporation 108-3 ([TCDS A-767](https://openairdocs.org/tcds/A-767))

## 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 Number: SA91Nw This certificate issued to: R. J. SCHROERS Purt 3 «the Civil Air Regulations, dated 15 May 1956, as amended by 3=4.

Original Product - Type bertificate Number -A-267

• Make Stinson (Universal) Mirtel: 108-3 Description of Type Design Change:

Installation of strobe light flashtube system installation (Dwg. JI-20) on Stinson 108-3 series aircraft in accordance with the FAA sealed R. J. Schroers Drawing List No. 001 and Installation Report No. 3000, dated November 17, 1973.

J. Schroers FAA Approved Airplane Flight Manual Supplement is required for installation.

Limitations and Conditions: The approval of this change in type design applies basically to the above model aircraft only. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this Certificate shall be maintained as part of the permanent records for the modified aircraft.

Date of Application: October 2, 1973 Date Reissued:

March 11, 1974 Date Amended:

FEDERAL AVIATION By digetion of the Slainistrater (Signature ) PAMINISTRAIO Chief, Engineering and Manufacturing Branch (Title) 000, imprisonment not exceeding 3 years, or both This certifate may be transfered in acandance wetth bAR 21.47 FAA FoR 8110-2 (10-68)

## Every issue (1)

- March 11, 1974: Issued, Current. [certificate](https://openairdocs.org/files/sha256/6b/35/6b358361614ee2cb308deb423de7a424710472654dc601b2c913498a951cc0af)

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