STC SA686SW

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA6865W This certificate issued to: Sierra Industries, Inc..

a Texas Corporation Garner Field Road Uvalde, TX 78801 Part Ab/9 of the Civil Air Poegulations.

Original Product Typo Certificate Number : A1SW and LTC 13 Маво : Sierra (Howard) and Lockheed Aircraft Corp.

Model: 500 and PV-1 Description of Type Design Change:

Installation of Pratt and Whitney R2800-CB16 engine power ratings with 100/130 grade fuel and cabin compressor automatic disconnect according to The Dee Howard Company Drawing List 14-0866-700 Revision C dated 8/8/74.

Increase gross weight to 34,575 pounds with cabin compressor disconnect system for Howard Model 500 according to The Dee Howard Report R-13-02 dated December 1966.

The following FAA Approved Airplane Flight Manual Supplements are required:

1. Dated September 12, 1966, is required with Howard Model 500.

2. Dated September 13, 1966, is required with Lockheed Model PV-1.

3. Dated March 7, 1967, is required for Howard Model 500 for increase gross weight.

Date of Application: JUly 25, 1966 Date Reissued: December 01, 1999 Date of Issuance: September 12, 1966 Date Amended: 3/29/67; 9/6/74 Revision 2 FEDERAL AVIATION By Direction of the Administrator Michela MOwsken (Signature) TOMINSTRATIO Michele M. Owsley, Manager Airplane Certification Office, Southwest Region (Title)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and streel) (City, Slak, and 21P code ) from (Name of grantor) (Print or type) (Address of grantor) (Number and sireel;

(City, Stake, and 2IP code, Extent of Authority (if licensing agreement):

Signature of grantor (In ink): - 020