STC SA00453DE

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA00453DE This certificate issued to: Oilamatic, Inc.

P.O. Box 5284 Englewood, CO 80155 Part 4aof the Civil Air Regulations.

Original Product -Type Certificate Number A-743 Make: Boeing Airplane Company Model: A75L3, 75, A75, B75, E75, A75J1, A75L300, A75N1, B75N1, D75N1, IB75A, & E75N1 Description of Type Design Change:

Installation of Oilamatic Preoiler system in accordance with FAA approved Oilamatic, Inc. Drawing List No.

STEA400, initial release, dated June 11, 2001, or later FAA approved revision.

1. FAA approved Airplane Flight Manual Supplement Engine Preoiler Boeing Stearman Model 75 Series, Rev.

No. N/C, dated June 11, 2001, or later FAA approved revision is required.

2. This approval should not be extended to aircraft of this model on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft.

3. 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.

4. A copy of this Certificate, Flight Manual Supplement, and Drawing Number STEA401, pages 1-6 dated July 1, 2000 must be maintained as part of the permanent records for the modified aircraft.

Date of Application: July 28, 2000 Date Reissued:

Date of Issuance: June 11,2001 Date Amended:

FEDERAL AVIATION By Direction of the Administrator Ronald F. May (Signature) Manager, Denver ACO ADMINIST RATION Northwest Mountain Region, Denver, Colorado (Title)