# STC SA00785CH

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: McCauley Propeller Systems, United States
- Description: Installation of McCauley propeller model 4HFR34C774/94LPA-0.
- Applied: January 21, 1997
- Status date: September 21, 2005
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A23SO](https://openairdocs.org/tcds/A23SO)
- Certificate PDF: https://openairdocs.org/files/sha256/79/e6/79e6e6d62f9d16405b9542998dea731010a927f91546825dd0cde9ab4679ff95
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E187B624B5AE98698625715500511971.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA00785CH

## ADs that name it (0)

None.

## Approved models (2)

- The New Piper Aircraft Inc. PA-42 ([TCDS A23SO](https://openairdocs.org/tcds/A23SO))
- The New Piper Aircraft Inc. PA-42-720 ([TCDS A23SO](https://openairdocs.org/tcds/A23SO))

## What the certificate says

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

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA00785CH This certificate issued to: McCauley Propeller Systems 7751 East Pawnee Wichita, KS 67207 Certifies that the change in the type design for the following product with the limitations and conditions therefor as speoified hereon meets the airoorthiness requirement's of Part 23 of the Federal Aviation Poegulations See Type Certificate Data Sheet No. A23SO for complete certification basis.

Original Product - Type Certificate Number: A2350 Abako: Piper Model: PA-42; PA-42-720 Description of Type Design Change:

Installation of McCauley Propeller Model 4HFR34C774/94LPA-0 in accordance with McCauley Technical Report No. 879, no revision, dated February 28, 1997, and McCauley Drawing No. D-60205, no revision, dated August 21, 1997 or later FAA approved revisions.

1. Compatibility of this design change with previously approved modifications must be determined by the installer.

Date of Application: January 21, 1997 Date Reissued: September 21, 2005 Date of Issuance: October 22, 1997 Date Amended:

FEDERAL AVIATION The direction of the Administgator (Signature) Thaddeus D. Krolicki, Jr.

TOMINISTRATO Manager, Propulsion Branch Chicago Aircraft Certification Office (Title)

PAA PORM 8110-2 (10-68) PAGE 1 of 3 PAGES

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number 5A00785CH Date of Issuance: October 22, 1997 Reissued: September 21, 2005 Limitations and Conditions: (Continued):

revisions, is required. 2. FAA Approved Flight Manual Supplement, Technical Report Number 878, dated October 22, 1997, or later FAA approved

3. The Pratt and Whitney engine model PT6A-41 (installed on the PA-42) and PT6A-61 engine (installed on the PA-42-720) are RPM. eligible with the McCauley Propeller Model 4HFR34C774/94LPA-0 with maximum continuous and takeoff rating of 720 HP and 2000

4. Aircraft Specifications are the same as listed on Type Certificate Data Sheet No. A23SO except as listed in McCauley Technical Report Number 878.

5. 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.

FAR FORM 8110-2-1 (10-69) PAGE 3 Of 3 PAGES

## Every issue (1)

- September 21, 2005: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/79/e6/79e6e6d62f9d16405b9542998dea731010a927f91546825dd0cde9ab4679ff95)

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