# STC SA1537NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Univair Aircraft Corp, United States
- Description: Installation of stamped wing ribs.
- Applied: February 22, 1983
- Status date: February 25, 1983
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A8](https://openairdocs.org/tcds/2A8)
- Certificate PDF: https://openairdocs.org/files/sha256/67/82/6782ca85f7c6c1cba0b7dfa93aeb4ff74119232ff71ae35571b40be6a15e01a5
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7BCB725E2CB6FEF585256CC1008212DF.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1537NM

## ADs that name it (0)

None.

## Approved models (3)

- Lavia Argentina S.A. (Laviasa) PA-25 ([TCDS 2A8](https://openairdocs.org/tcds/2A8))
- Lavia Argentina S.A. (Laviasa) PA-25-235 ([TCDS 2A8](https://openairdocs.org/tcds/2A8))
- Lavia Argentina S.A. (Laviasa) PA-25-260 ([TCDS 2A8](https://openairdocs.org/tcds/2A8))

## What the certificate says

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

A846hmo5 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA1537NM This certificate issued to: Univair Aircraft Corp.

Route 3, Box 59 Aurora, Colorado 80011 Part 3 of the CiVil Air Regulations.

Original Product -Type Centificate Numben: 2A8 Make: Piper Model: PA-25, PА-25-235, PА-25-260 Description of Type Design Change:

Installation of stamped aluminum wing ribs in accordance with Univair's 'Application Chart Univair Replacement Rib Cross Reference to Piper Original Rib FAA approved February 25, 1983 or subsequent FAA approved revision.

This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those previously approved modifications will introduce no adverse effect upon the airworthiness of the aircraft.

Date of Application: February 22, 1983 Jute rissued:

Date of Issuance: February 25, 1983 I ate unevended:

FEDERAL AVIATION By Direction of the Administrator Marké. Faldwen Mark E. Baldwin, (Signature) Manager TOMINISTRATOS Denver Aircraft Certification Field Office Northwest Mountain Region, Aurora, Colorado (Title)

47.

## Every issue (1)

- February 25, 1983: Issued, Current. [certificate](https://openairdocs.org/files/sha256/67/82/6782ca85f7c6c1cba0b7dfa93aeb4ff74119232ff71ae35571b40be6a15e01a5)

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