STC SA2542SO

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA254250 This certificate issued to: Pemco Aeroplex, Inc. 100 Pemco Drive SURRENDERED Dothan, AL 36303 2/21/00 Certifies that the change in the type design for the following product with the limitutions and conditions therefor as specified hereon meets the airworthiness requirement's of Part Ab of the Civil Air Regulations.

Original Product -Type Certificate Number: A6WE Make: McDonnell Douglas Model: DC-9-32 Description of Type Design Change:

Installation of Cargo Door in accordance with Master Drawing List, Pemco Report No. P88-006, Revision E, dated February 11, 1989, or later FAA approved revision.

1. 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 other previously approved modifications will produce no adverse effect upon the airworthiness of that airplane. This determination should include consideration of significant changes in weight distribution such as an increase in the fixed disposable weight in the fuselage.

2. Airplane Flight Manual Supplement, dated April 20, 1989, (Pemco Report No. P09-001FM), is a required parts

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.

Date of Application: June 22, 1987 Date Reissued: 9/22/94; 6/29/98; 11/5/99 Date of Issuance: April 21, 1989 Date Amended:

EDERAL By Direction of the Administrator Ronald F. May (Signature) Manager ( TO MANISY RATION Northwest Mountain Region Denver Aircraft Certification Office (Title)