# STC SA3239CH

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Tri-State Aviation, Inc, United States
- Description: Installation of modified propeller blades
- Applied: February 9, 2010
- Status date: December 31, 2014
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS LTC-11](https://openairdocs.org/tcds/LTC-11)
- Certificate PDF: https://openairdocs.org/files/sha256/62/32/6232ccf5624a8a8718e15aacfa038095f3014cf4fa405b3f4e3f018644fbf07c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F5A53677D438EF8A86257DE20063C727.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3239CH

## ADs that name it (0)

None.

## Approved models (3)

- Cal Pacific Airmotive Inc. Army P-51C ([TCDS LTC-11](https://openairdocs.org/tcds/LTC-11))
- Cal Pacific Airmotive Inc. Army P-51D ([TCDS LTC-11](https://openairdocs.org/tcds/LTC-11))
- Cal Pacific Airmotive Inc. Army P-51K ([TCDS LTC-11](https://openairdocs.org/tcds/LTC-11))

## 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 09 of the Civil Air Regulations. See Type Certificate Data Sheet.

No. LTC-11 for complete certification basis.

Original Product-Type Certificate N umber: LTC-11 M ake: Cal Pacific Airmotive M odel: P-51C, P-51D (USAF F-51D), P-51K (USAF F-51K)

Description of Type Design Change: Installation of modified propeller blades in accordance with Tri -State Aviation (TSA) Report No. 519, Revision 49, dated July 8, 2013, or later FAA Approved revision.

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

2. Engine operation must not exceed 57 inches of engine manifold pressure except for propeller blade model 6813A which can use published operation specifications per Type Certificate Data Sheet LTC-11.

3. Airplane using these blades must have a cockpit placard installed defining the engine manifold pressure limitation except when 6813A model blades are installed.

4. Propeller blades must be maintained in accordance with Instructions for Continued Airworthiness, Revision 1, dated July 8, 2013 or later FAA accepted revision.

5. Airplane Model P-51B is eligible for this modification based on LTC-11, Note 6.

6. 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...

This certificate and the supporting data, which is the basis for approval, shall remain in effect unt il surrendered, suspended, rev oked or a termination date is otherwise established by the Administrator of the Federal Aviation Administration.

Tri-State Aviation, Inc.

1251 Pegasus Road Wahpeton, ND 58075

Date of application: February 9, 2010

Date of issuance: July 17, 2013 Date reissued:

Date amended: December 31, 2014

Original Signed By:

Timothy Smyth

(Signature) Timothy P. Smyth Manager, Chicago Aircraft Certification Office

(Title)

Limitations and Conditions (Continued)

## Every issue (2)

- December 31, 2014: Amended, Current. [certificate](https://openairdocs.org/files/sha256/62/32/6232ccf5624a8a8718e15aacfa038095f3014cf4fa405b3f4e3f018644fbf07c)
- July 17, 2013: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/fe/02/fe0249fbc732e4b6959e301272a7192b467376a26bdb80268e152ab7c5a72496)

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From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.