# STC SA921GL

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Shadin Avionics, United States
- Description: Installation of a Shadin Company fuel flow indicating system.
- Applied: April 22, 1985
- Status date: July 24, 1985
- Product: Aircraft, Single-Engine
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS 1A15](https://openairdocs.org/tcds/1A15)
- Certificate PDF: https://openairdocs.org/files/sha256/f7/1e/f71eca1570097bfc15a085b33aff2f3e2b8ccef85747b86c9621f5d157948613
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AB9FCA4672A0FD3A862572FF004A2838.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA921GL

## ADs that name it (0)

None.

## Approved models (4)

- Piper Aircraft Inc. PA-24 ([TCDS 1A15](https://openairdocs.org/tcds/1A15))
- Piper Aircraft Inc. PA-24-250 ([TCDS 1A15](https://openairdocs.org/tcds/1A15))
- Piper Aircraft Inc. PA-24-260 ([TCDS 1A15](https://openairdocs.org/tcds/1A15))
- Piper Aircraft Inc. PA-24-400 ([TCDS 1A15](https://openairdocs.org/tcds/1A15))

## 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.

Part 3 of the Civil Air Regulations.

(See Type Certificate Data Sheet No. 1A15 for complete certification basis.)

Installation of a Shadin Company Fuel Flow Indicating System in accordance with Shadin Company Report Number 4085, dated April 22, 1985, or other FAA approved revision.

1) This approval should not be extended to other airplanes of this model that incorporate any other previously approved modification, unless it is determined that the interrelationship between this change and any other previously approved modification will introduce no adverse effect on the airworthiness of these airplanes.

2) 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.

Shadin Avionics 6831 Oxford Street St. Louis Park, MN 55426 1A15 Make : Piper Model : PA-24, PA-24-250. PA-24-260, PA-24-400 Date of application : April 22, 1985

Date of issuance : July 24, 1985

Date reissued : June 8, 2006

( Signature) Charles L. Smalley Manager, Systems & Flight Test Branch Chicago Aircraft Certification Office

( Title)

## Every issue (1)

- July 24, 1985: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/f7/1e/f71eca1570097bfc15a085b33aff2f3e2b8ccef85747b86c9621f5d157948613)

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