STC SA2951WE

Number SA2951WE This Certificate issued to L-3 Communications Integrated Systems L.P.

10001 Jack Finney Blvd.

Greenville, TX 75402 Part 25 of the Federal Aviation Regulations.

Original Product Type Certificate Number: A20WE Make : Boeing Model : 747-E4A and E4B Description of Type Design Change:

Installation of Steward Davis Airstairs P/N 77004 in accordance with FAA Sealed E-Systems Inc. E4A Airstair Drawing List No. G8494.00.43 Revision “B” or later sealed revision in the 747-E4A aircraft or in accordance with FAA Sealed E-Systems Inc. E4B Airstair Drawing List No. G7101.00.90 Revision “C” or later FAA Sealed revision in the 747-E4B aircraft.

Date of application : 3/5/74; 11/2/77 Date reissued : July 29, 2002 Date of issuance : May 5, 1975 Date amended : Amend. 1 – Feb. 8, 1978;

Amend. 2 – March 23, 1978 By direction of the Administrator

( Signature) S. Frances Cox, Manager Special Certification Office, Southwest Region

(Title)

FAA Form 8110-2-1(10-69) Page 3 of 3

Number SA2951WE Reissuance Date: July 29, 2002

Limitations and Conditions:. (Continued)

1. Compatibility of this design change with previously approved modifications must be determined by the installer.

2. 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.

3. This STC can only be installed in 747-E4A aircraft modified per STC SA1931SW and 747-E4B aircraft modified per STC SA2703SW. The approval of this change in type design applies basically to the Boeing 747-E4A and 747-E4B 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 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 on such as an increase in the fixed disposable weight in the fuselage.

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