STC SA1986NM

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

Number: SA1986NM

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

Part 4b of the Civil Air Regulations.

Original Product Make: Boeing Type Certificate Number: A3WE Model: 727-200 Series

Description of Type Design Change: Installation of Winters Aircraft Engineering Company airstair in accordance with FAA approved Winters Aircraft Engineering Company Drawing List Number 1423-2700, Revision N/C, dated November 2, 1982, or later FAA approved revision.

Limitations and Conditions: This approval of this change in type design applies basically to the aforementioned model only. This approval should not be extended to other aircraft 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 effec t upon the airworthiness of th ese aircraft. This determination should include consideration of significant changes in weight distribution, such as an increase in the fixed disposable weight in the fuselage. If the holder agrees to permit another person to use this certificate to alte r the product, the holder shall give the other person written evidence of that permission.

Date of Application: November 4, 1982 Date Reissued: November 3, 1988; July 16, 1997;

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

December 11, 2020

Date of Issuance: June 28, 1983 Date Amended:

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

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

Number: SA1986NM