STC SA4018WE

FAA Form 8110-2 (4/20) SUPERSEDES PREVIOUS EDITION Page 1 of 2

Number: SA4018WE

Dow Aero Logistics, LLC 6800 Camille Avenue Oklahoma City, Oklahoma 73149

Part 25 of the Civil Air Regulations.

Original Product Make: Lockheed Type Certificate Number: 2A15 Model: 1329

Description of Type Design Change: Installation of on- board airstair in accordance with FAA sealed Winters Aircraft Engineering Company Drawing List Number AS1000- 0100 Revision F or later FAA approved revision.

Limitations and Conditions: This approval of this change in type design applies basically to the Lockheed Model 1329 aircraft only. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated, unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. This determination should include consideration of significant changes in weight distribution such as an increase in the fixed disposable weight of the fuselage. 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: May 1, 1979 Date Reissued: November 2, 1988; July 16, 1997;

January 5, 2000; December 3, 2001; April 28, 2008;

December 11, 2020

Date of Issuance: December 6, 1979 Date Amended:

Title: Manager, Technical & Administrative Support Section Aviation Safety Los Angeles ACO Branch

Number: SA4018WE