# STC SA09478SC

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Steinbach & Associates, Inc., United States
- Description: Conversion of existing Piper air conditioning system from R12 to R134a refrigerant.
- Applied: November 7, 1997
- Status date: May 1, 1998
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A8EA](https://openairdocs.org/tcds/A8EA)
- Certificate PDF: https://openairdocs.org/files/sha256/be/ca/becab4eaf6f7d9be4c7607213dbd8789458e93e95f0ff121adcf98da13bd4faf
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/24CAC817183E92AE85256CC1007F3B20.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09478SC

## ADs that name it (0)

None.

## Approved models (2)

- Piper Aircraft Inc. PA-31T ([TCDS A8EA](https://openairdocs.org/tcds/A8EA))
- Piper Aircraft Inc. PA-31T1 ([TCDS A8EA](https://openairdocs.org/tcds/A8EA))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

JHttttch ^tntre fflf .Amtrira of BCritnsporinttoit - ^E^era! .Afctattmt cA*mritttstrjrtt(m CertificateProject No. ST5036SC-A (GS) SA09478SC Steinbach & Associates, Inc.

2224 Carolinda Drive Waco, TX 76710 Civil Air A8EA Piper PA-31T; PA-31T1 .- Conversion of existing Piper air conditioning system from R12 to R134a refrigerant in accordance with Steinbach & Associates, Inc., Master Drawing List 9736000, Rev. B, dated 4/30/98, or later FAA approved revision.

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.

This modification applicable to the following serial numbers: PA-31T-31T- 7400002-31T-7400009, 31T7520001- 31T7520043, 31T-7620001-31T-7620057, 31T7720001-31T-7720069PA-31T1-31T-7804001-31T-7804011, 31T7904001-31T7904057 , 31T-8004001-31T-8004057, 31T-8104001-31T-8104101, 31T-8304001-31T-8304Q03, 31T1104004 AND UP. PA-31T-31T-7820001-31T-7820092, 31T-792001-31T-7920094, 31T-8020001-31T-8020092, 31T-8120001-31T-8120070, 31T-8 12010 1-31T-8 120104 .

f&ue&faf cv « daSc . -November 06, 1997 .- May 01, 1998 I ^ LjtiS\ (Signature) rrt*' ^s. Frances Cox, Acting Manager {/ Special Certification Office Southwest Region (TMe) Any alcetacion of thJa certificate Is puniahabJe by i fine of not exceed? $1,000, or toprisonnent not exceeding 3 years, vi both.

FAA Form 3110-2(10-68) Page 1 of 2 IMS certificate »*y i>5 transferred in accordance with FA* 21

I IS'S'l'Rl CTIONS The1 transfer rndorsenirnl hrltiw may bf used lo nnlil\ ilie .ippropriate KAA I' cgmnal OIN< c of I he tr,insl<-r of ihu .SiippU-iii<-nia] Type Ceriidraie 1 he I'AA ^\'i]l TL-ISSMC tlu- crt'iihc n\c in ihr nanur ol ihr iran^ferce and lorward ii (o himr

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number ___.

to (Name a/ transferee) (Address o/ transferee).

r and street) from (Name oj grantor) (Print OJ typf) __ (Address oj grantor) and street) ( City, Slalt, and ^IP cade) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- May 1, 1998: Issued, Current. [certificate](https://openairdocs.org/files/sha256/be/ca/becab4eaf6f7d9be4c7607213dbd8789458e93e95f0ff121adcf98da13bd4faf)

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