# STC SA1225NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Seaplane Flying Inc, United States
- Description: Installation of a Nite Sign, Inc. Model N47B Aerial Advertising System
- Applied: April 20, 1981
- Status date: May 18, 1981
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-767](https://openairdocs.org/tcds/A-767)
- Certificate PDF: https://openairdocs.org/files/sha256/3a/71/3a719fe3e2f614f41649863e02151e50aecb524d43ca8bd6647999b29baea2d5
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AECA47249CD10AE886257A3A006D4199.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1225NW

## ADs that name it (0)

None.

## Approved models (1)

- Univair Aircraft Corporation 108-2 ([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 SA 1225NW This certificate issued to: Seaplane Flying, Inc.

Purt 3 1f the CiVil Air Fragulations Original Product - Type Gertificate Number: A-767 Make: Univair (Stinson) Model: 108-2 Lescriplin Jype taign Change: Installation of a Nite Sign, Inc. Model N478 Aeria dvertising System in accordance with Seaplane Flying, Inc. photographs 1 through S NOTE: This installation includes a Skytronics, Inc. 50 amp alternator (P/N 6575T), voltage regulator (MOD J12M205P), circuit breakers (Dwg. P1001), and associated systems.

The aircraft will be operated in accordance with Operating Limitations dated 5 - 11 - 81 for Multiple Airworthiness Restricted/Normal Category..

Limitations and Conditions: (See "Continuation Sheet", Page 3) Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation in Univair (Stinson) 108-2, Serial Number 108-2755 only. A copy of this Certificate shall be maintained as part of the permanent records for the modified aircraft.

April 20, 1961 Wau pun I ate of rasuance. MAy 18 1981 Date Amended:

FEDERAL AVIATION By Direction of the Administrator 1 Signature TO O Acting Chief, Seattle Area Aircraft Certification Office { Title)

47.

FAA Fok- 8110-2 (10-68)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Shect) May 18, 1981 Number: SA1225NW Description of Type Design Change:

NOTE: Display these placards in full view of the pilot:

WHEN NITE SIGN IS INSTALLED (RESTRICTED CATEGORY) VNE = 100 MPH CAS Vy = 75 MPH CAS CREW IS LIMITED TO: PILOT AND ONE OBSERVER

- END -

**FAA FORM B110-2-1 (10-69) PAGE 3OF 3 PAGES C FAA AC 73-2651**

## Every issue (1)

- May 18, 1981: Issued, Current. [certificate](https://openairdocs.org/files/sha256/3a/71/3a719fe3e2f614f41649863e02151e50aecb524d43ca8bd6647999b29baea2d5)

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