# STC SA2775SO

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: WACO Classic Aircraft Corporation, United States
- Description: Installation of an emergency induction air door in accordance with Aircraft Specialist Installation Instructions, Alternate Air Door Adapter,  dated April 30, 1990, or later FAA approved revision and Drawing Nos. AAD 16670-1, revised April 21, 1990; AAD 16670-2, revised April 21, 1990; and AAD16670-3, dated April 21, 1990, or later FAA approved revisions.
- Applied: April 3, 1989
- Status date: October 4, 2011
- Product: Aircraft, Single-Engine
- Certification basis: Part 21, Part 23
- Data sheets: [TCDS A18EA](https://openairdocs.org/tcds/A18EA)
- Certificate PDF: https://openairdocs.org/files/sha256/d7/ef/d7ef3d57b76c2f1721009510561e83a737bfd9518c3a6ae61746c02589840f20
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A9829D3CFABCD1F986257958007A6541.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2775SO

## ADs that name it (0)

None.

## Approved models (2)

- Chaparral Motors Inc. 2T-1A-1 ([TCDS A18EA](https://openairdocs.org/tcds/A18EA))
- Chaparral Motors Inc. 2T-1A-2 ([TCDS A18EA](https://openairdocs.org/tcds/A18EA))

## 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 23 of the Federal Aviation Regulations.

Installation of an emergency induction air door in accordance with Aircraft Specialist “Installation Instructions, Alternate Air Door Adapter,” dated April 30, 1990, or later FAA approved revision and Drawing Nos. AAD 16670-1, revised April 21, 1990; AAD 16670-2, revised April 21, 1990; and AAD16670-3, dated April 21, 1990, or later FAA approved revisions.

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 other previously approved modifications will produce no adverse effect upon the airworthiness of that airplane. This modification is eligible on Model 2T-1A-1 and 2T-1A-2 equipped with Lycoming Model IO-360-B1F6 or AEIO-360-B1G6 engines. 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.

Waco Classic Aircraft Corporation 15955 S. Airport Rd Battle Creek, Michigan 49015 A18EA Make : Chapparal Motors Model : 2T-1A-1 and 2T-1A-2

Date of application : April 3, 1989

Date of issuance : May 23, 1990

Date reissued : July 15, 2003; December 23, 2009; October 4, 2011

( Signature) Melvin D. Taylor Manager Atlanta Aircraft Certification Office

( Title)

## Every issue (2)

- October 4, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/d7/ef/d7ef3d57b76c2f1721009510561e83a737bfd9518c3a6ae61746c02589840f20)
- December 23, 2009: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/34/bb/34bb6e75ac6f8a3a27991be7cf80b6eeb458c06aaf5f0099095865c19d0fef9f)

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