# STC SA4051NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Univair Aircraft Corporation, United States
- Description: Installation of replacement aft fuselage tail section with Univair repair section U-12183-TS.
- Applied: May 30, 1989
- Status date: June 9, 1989
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1A2](https://openairdocs.org/tcds/1A2)
- Certificate PDF: https://openairdocs.org/files/sha256/f7/2d/f72ddd78963cc4339d2d8442d7f8a7ebf817a103a7fea25f8c400bb83b1ae47d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E626CB972A08552D85256CC2000C606E.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4051NM

## ADs that name it (0)

None.

## Approved models (9)

- Piper Aircraft Inc. PA-18 ([TCDS 1A2](https://openairdocs.org/tcds/1A2))
- Piper Aircraft Inc. PA-18-125 (Army L-21A) ([TCDS 1A2](https://openairdocs.org/tcds/1A2))
- Piper Aircraft Inc. PA-18-135 ([TCDS 1A2](https://openairdocs.org/tcds/1A2))
- Piper Aircraft Inc. PA-18-150 ([TCDS 1A2](https://openairdocs.org/tcds/1A2))
- Piper Aircraft Inc. PA-18S ([TCDS 1A2](https://openairdocs.org/tcds/1A2))
- Piper Aircraft Inc. PA-18S-105 (Special) ([TCDS 1A2](https://openairdocs.org/tcds/1A2))
- Piper Aircraft Inc. PA-18S-125 ([TCDS 1A2](https://openairdocs.org/tcds/1A2))
- Piper Aircraft Inc. PA-18S-135 ([TCDS 1A2](https://openairdocs.org/tcds/1A2))
- Piper Aircraft Inc. PA-18S-150 ([TCDS 1A2](https://openairdocs.org/tcds/1A2))

## 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: SA4051NM This certificate issued to: Univair Aircraft corporation Purt 3 of the CIVII Air Regulations.

Original Product - Type bertificate Number: 1A2 Make: Piper Model: PA-18, PA-18 "105", PA-18 "125", PA-18 "135" Dumplin/: SypoIsynlikang 28S "105", PA-18S "125", PA-185 "135", PA-185 "150 PA-18 150" Installation of replacement aft fuselage tail section with Univair repair section U-12183-TS in accordance with Univair Master Drawing List U-12183-MDL, no revision, FAA approved June 9, 1989, or later FAA approved revision.

1. Univair U-12183-IS Installation Procedure and Installation Drawing U-12183-T are required.

2. Approval of this change in type design appiles to the above model aircraft only. This approval should not be extended to aircrait of this model on which other previously approved modifications are incorporated unless it is determined that the relationship between (See Continuation Sheet, Page 3 or 3 Pages)

Date of Application: May 30, 1989 Date Reissued:

Date of Issuance: June 9, 1989 Date Amended:

FEDERAL AVIATION long the Administraton MICHAEL H. BORFIT%, (Signature, Supervisor Denver Aircraft Certification Field Office Northwest Mountain Region, Denver, Colorado (Title) 47 FAA FORM 8110-2 (10-68)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA4051NM any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft.

**FAA FORM 8110-2-1 (10-69) PAGE 3 OF3 PAGES**

## Every issue (1)

- June 9, 1989: Issued, Current. [certificate](https://openairdocs.org/files/sha256/f7/2d/f72ddd78963cc4339d2d8442d7f8a7ebf817a103a7fea25f8c400bb83b1ae47d)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.