STC SA260WE

600 Jefferson Street Houston, Texas 77002 Part 4b of the Civil Air Regulations December 31, 1953 Amendments 4b-1 through 4b-7; SR 422B and FAA letter to Boeing dated October 12, 1959.

4A28

Boeing

720-022 Description of Type Design Change: Applicable aircraft may be modified to have alternate interior arrangements consisting of 28 four abreast seats or 35 fi ve abreast seats forward of a class divider and 78 six abreast seats aft of a class divider. The arrangement s and necessary parts are called for on United Air Lines Drawing 9F-5000, sheets 1 and 2, “no change.”

Limitations and Conditions: This approval should not be extended to other specific airplanes of this model on which other previously approved modifications ar e incorporated, unless it is determined that the interrelationship between this cha nge and any of those other previ ously approved modifications will introduce no adverse effect upon the airworthiness of th at airplane. If the holder agrees to permit another person to use this certificate to alter the product, th e holder shall give the other person written evidence of that permission.

This certificate and the supporting data, which is the basis for approval, shall remain in effect until surrendered, suspended, revoked or a termination date is otherwise established by the Administrator of the Federal Aviation Administration.

Date of application: October 16, 1962

Date of issuance: October 29 1962

Date reissued: November 30, 2011

( Signature) Haifa Haj-Eid Supervisor, Technical & Administrative Support Staff Los Angeles Aircraft Certification Office ( Title)

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