# STC SA00426AT

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Whelen Aerospace Technologies, United States
- Description: Installation of a composite WHOLLEY COWL.
- Applied: March 23, 1993
- Status date: January 24, 2023
- Product: Aircraft, Small Airplane
- Data sheets: [TCDS 1A15](https://openairdocs.org/tcds/1A15)
- Certificate PDF: https://openairdocs.org/files/sha256/04/68/046824d8b3426777ddc6c3c93239f6fc38b64f1bad02c6bd30a97997da448337
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID103289862720230206152415.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA00426AT

## ADs that name it (0)

None.

## Approved models (2)

- 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))

## 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.

SA00426AT Whelen Aerospace Technologies 51 Winthrop Road Chester, CT 06412 Part 3 the Civil Air Regulations 1A15 Piper PA24-180/-250/-260/-260B Installation of a composite WHOLLEY COWL in accordance with LoPresti Speed Merchants “Master Drawing List, Report No. 31, dated November 1, 1993 or later 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 other previously approved modifications will produce no adverse effect upon the airworthiness of that airplane. (See continuation sheet 3 of 3) March 23, 1993 January 16, 2019; January 24, 2023 January 22, 1992 July 10, 1995; January 24, 1996 (for) Robert P. Capezzuto Acting Manager, Atlanta ACO Branch 3

SA00426AT 3

SA00426AT Date Reissued: January 24, 2023

Limitations and Conditions: (Continued):

This determination should include consideration of significant changes in weight distribution such as an increase in the fixed disposable weight in the fuselage.

--------------------END-------------------- 3 3

## Every issue (2)

- January 24, 2023: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/04/68/046824d8b3426777ddc6c3c93239f6fc38b64f1bad02c6bd30a97997da448337)
- January 16, 2019: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/55/4f/554f72f3da6f2522b2169535b3e0966c1c4f3dbaef66c9c551cd823575614bf6)

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