# STC SP725NW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Pacific Propeller International LLC, United States
- Description: Install barrel support block No. PPI 51462-10 in place of Hamilton Standard Part No. 51462 in accordance with Pacific Propeller, Inc. Drawing List o. 76018, dated February 7, 1979, or later FAA approved revision thereto.
- Applied: January 23, 1979
- Status date: March 25, 2004
- Product: Propeller
- Certification basis: Part 21, Part 35
- Data sheets: [TCDS P-257](https://openairdocs.org/tcds/P-257)
- Certificate PDF: https://openairdocs.org/files/sha256/e0/90/e090c32969cea77289806a6a8fee63d3078db52a7a13376cf944f9e2c1bb6c6f
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/64FDE9B689C87FAC86256E7B00662F26.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SP725NW

## ADs that name it (0)

None.

## Approved models (1)

- Hamilton Standard Division 12D ([TCDS P-257](https://openairdocs.org/tcds/P-257))

## 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.

Number SP725NW This certificate, issued to: Pacific Propeller International LLC 5802 South 228th Street Kent, WA 98032-1810 Part 35 of theFederal Aviation Regulations.

Original ProductType Certificate Number: P-257 Make: Hamilton Standard Model: 12D40

Description of the Type Design Change: Install barrel support block No. PPI 51462-10 in place of Hamilton Standard Part No. 51462 in accordance with Pacific Propeller, Inc. Drawing List o. 76018, dated February 7, 1979, or later FAA approved revision thereto.

Limitations and Conditions: Pacific Propeller Part No. PPI 51462-10 is limited to use in 12D40 hubs that have had the barrel, Hamilton Standard Part No. 50384, reworked to maximum inside diameter in accordance with Hamilton Standard Service Manual 110D.

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.

Date of application: January 23, 1979 Date reissued: March 25, 2004 Date of issuance: February 28, 1979 Date amended: March 25, 2004

(Signature) Acting Manager, Seattle Aircraft Certification Office (Title)

**FAA FORM 8110-2(10-68**

## Every issue (1)

- March 25, 2004: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e0/90/e090c32969cea77289806a6a8fee63d3078db52a7a13376cf944f9e2c1bb6c6f)

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