# STC SA1684NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: David J. Clark, United States
- Description: Replacement of the original Teledyne continental A-65-8 engine with a Teledyne Continental A75-8 engine and McCauley 1B90CM7042 propeller
- Applied: July 1, 1982
- Status date: August 17, 1982
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-759](https://openairdocs.org/tcds/A-759)
- Certificate PDF: https://openairdocs.org/files/sha256/65/98/6598166e54ca233abe3beb4201b05daa35e0fcbbf9709e2bfaadea42fcc0c92a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E1B9EC7C79D9351E862579FB00636F32.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1684NM

## ADs that name it (0)

None.

## Approved models (1)

- American Champion Aircraft Corp. 7AC ([TCDS A-759](https://openairdocs.org/tcds/A-759))

## What the certificate says

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

Maniced States of Smcrica Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA1684801 This certificate issued to: David J. Clark Certifies that the change in the type design fer the fellaving proud with the limitations and conditions therefore specified heren mets the wireshinesurequirmentat Purt 3 of the CIVII AiT Regulatione Original Product - Type Certificato Number: 759 Matic: Bellanca Mertet: ZAC LescriplumfLype LuynChange. Replacement of the original Teledyne Continenta 1-65-8 engine with a Teledyne Continental A75-8 engine and McCauley 1B90CM7042 propeller on Bellanca Model 7AC airplanes in accordance with FAA Sealed David J. Clark Installation Instructions, dated August 16, 1982, or later FAA approved revision.

Limitations and Conditions: The approval of this change in type design applies to basic Bellanca Model ZAC airplanes equipped with a factory installed Teledyne Continental A-65-8 engine installation only. This approval should not be extended to other airplanes of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the modifications will introduce no adverse effect on the airworthiness of that aircraft. Airplanes equipped with this Supplemental Airplane Flight Manual installation must be operaje, 1982, corcance with FAA approvec dated August cevision.

This certificate and run en effect untu sur rendered, suspended, rented, we a termination date is ethe reise established by the ildministrater sf the Federal Aviation Administration Late sf afflication: July 1, 1982 Lute reassed:

Gate f issuence. August 17, 1982 Date Amended:

FEDERAL AVIATION son of the Eldministrater Lamell M. Kodenan (Signature ) TOMINISTRA Certification Office, ANM-100S (Title)

47.

## Every issue (1)

- August 17, 1982: Issued, Current. [certificate](https://openairdocs.org/files/sha256/65/98/6598166e54ca233abe3beb4201b05daa35e0fcbbf9709e2bfaadea42fcc0c92a)

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