# STC SA00412WI

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Air Plains Services Corporation, United States
- Description: Installation of McCauley D3A34C401/90DFA -2, -4, -6, -8, -10 propeller with Teledyne Continental motors IO-550-D engines already installed, and associated changes.
- Applied: April 12, 1995
- Status date: September 22, 2005
- Product: Aircraft, Single-Engine
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS 3A24](https://openairdocs.org/tcds/3A24)
- Certificate PDF: https://openairdocs.org/files/sha256/79/13/7913dcd72db0ac4bb62dad00965bb183ec7e93b32a095c3cd97a5f2da0966e38
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B2FF4D26299E31D58625717100528674.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA00412WI

## ADs that name it (0)

None.

## Approved models (8)

- The Cessna Aircraft Company 185 ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- The Cessna Aircraft Company 185A ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- The Cessna Aircraft Company 185B ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- The Cessna Aircraft Company 185C ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- The Cessna Aircraft Company 185D ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- The Cessna Aircraft Company 185E ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- The Cessna Aircraft Company A185E ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- The Cessna Aircraft Company A185F ([TCDS 3A24](https://openairdocs.org/tcds/3A24))

## 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.

This certificate issued to: Air Plains Services Corporation Wellington Airport P. O. Box 541 Wellington, KS 67152

Part 3 of the Civil Air Regulations.

Original Product - Type Certificate Number : 3A24 Make : Cessna Model : 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F

Installation of McCauley D3A34C401/90DFA -2, -4, -6, -8, and -10 propeller on aircraft with Teledyne Continental Motors IO-550-D engines already previously approved and installed. Data Required: C S Industries Installation Instructions No. 401A, Rev. – , dated March 15, 1996, or later “FAA Approved” revisions.

The McCauley Propeller Model D3A34C401/90DFA-( ) should be installed on those Cessna Models with TCM IO-550-D engines installed. For the Models listed above, the installation of D3A34C401/90DFA-( ) propeller is limited to not over 88 inches and not under 80 inches diameter for land, float and amphibian planes. Placard is required to indicate the operating restrictions for continuous operation.

Date of application : April 12, 1995 Date of issuance : March 15, 1996 Date reissued : September 22, 2005

Date amended : March 09, 1998

Original signed by Dan Withers

(Signature) Dan Withers Program Manager Wichita Aircraft Certification Office (Title)

FAA FORM 8110-2-1(10-69) PAGE 3 of 3 PAGES

Number SA00412WI

Date of Issuance: March 15, 1996 Date Amended: March 09, 1998 Date Reissued: September 22, 2005

The Operating Restrictions Placard should state: “Avoid Continuous Operation between the following RPM and manifold pressures at the stated diameters”:

Propeller Model Diameter Range (inches) RPM Inches MP C401/90DFA -2 88 to 86 1900 to 2100 26 and above C401/90DFA -4 86 to 84 1900 to 2100 26 and above C401/90DFA -6, -8, -10 84 to 80 No Placard required.

or later “FAA Approved” revision of any of these documents.

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

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.

--END--

## Every issue (1)

- September 22, 2005: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/79/13/7913dcd72db0ac4bb62dad00965bb183ec7e93b32a095c3cd97a5f2da0966e38)

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