STC SA1797SO

Number SA1797SO

This certificate, issued to Aeronautical Engineers, Inc.

P. O. Box 661027 Miami, Florida 33166

Part 4b of the Civil Air Regulations.

Original ProductType Certificate Number: A3WE Make: Boeing Model: 727 Series, 727-100 Series, 727-200 Series

Description of the Type Design Change: Installation of a cargo door in accordance with Aeronautical Engineers, Inc. Report No. R-517, “Drawing List, Cargo Door Installation in B727 A/C,” dated April 10, 1985, or later FAA approved revision, for 727 and 727-100 Series. Installation of a cargo door in accordance with Aeronautical Engineers, Inc. Report R-517, Revision W, dated April 1, 1993, or later FAA approved revision for 727-100 series.

Limitations and Conditions: The approval of this change applies to Boeing Model 727 Series, 727-100 Series and 727-200 Series airplanes 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 produce no adverse effect upon the airworthiness of that aircraft. This determination should include consideration of significant changes in weight distribution such as increase in the fixed disposal weight in the fuselage.

Continued on page 2.

Date of application: April 22, 1985 Date reissued:

Date of issuance: June 21, 1985 Date amended: April 7, 1993

(Signature)

Manager, Seattle Aircraft Certification Office (Title)

Number SA1797SO

Aeronautical Engineers, Inc.

Issued: June 21, 1985 Reissued:

Amended: April 7, 1993

Limitations and Conditions continued: Airplane Flight Manual Supplement No. R-547-1, dated June 21, 1985, is a required part of this STC for 727 or 727-100 Series. Airplane Flight Manual Supplement, Aeronautical Engineers, Inc. Report R-730, dated April 7, 1993, is a required part of this STC for Model 727-200 Series airplanes. The airplane will be inspected in accordance with Aeronautical Engineers, Inc. Report No. R-538, “Cargo Door Daily Inspection Procedures,” dated April 7, 1982, Report No. R-539, “Cargo Door 250 Hour Inspection Procedures,” dated April 7, 1982, and Report No. R-527, “Cargo Door 3000 Hours Inspection Procedures,” dated April 7, 1982, (or later FAA approved revisions of these reports).

Note: Cargo Doors installed in accordance with Drawing List, Aeronautical Engineers, Inc. Report R-517, Revision W, or later FAA approved revision, meet the requirements of FAR 25.783, Amendment 25-54.

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FAA FORM 8110-2-1 (10-69) PAGE 3 OF 3 PAGES