STC SA1045WE

This Certificate issued to United Air Lines, Inc.

600 Jefferson Street Houston, Texas 77002

Part 4b of the Civil Air Regulations amended to October 1, 1949 Original Product Type Certificate Number :

6A4

Boeing

DC-6, 6B Description of Type Design Change: Installation of door-mounted inflatable evacuation slides in accordance with United Air Lines Approved Drawing List COA 6-3072/COA 6-3087. United Air Lines Supplemental Revision No. 1 dated August 25, 1965, to Douglas Airplane Flight Manual SM-19501, or Supplemental Revision No. 1 dated June 10, 1966, to Douglas AFM SM-19544 is required.

Limitations and Conditions: The approval of this change in type design applies basically to the Douglas DC-6 and DC-6B. This approval s hould not be extended to other specifi c aircraft of this model on which other previously approved modifications are incorporat ed unless it is determined that the interrelationship between this change and any of those other previ ously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. Insta llation of a slide on the crew door in no way qualifies that door as an approved passenger emergency exit. If the holder agrees to permit another person to use this certificate to alter the product, the holder sh all 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: May 5, 1966

Date of issuance: August 25, 1965

Date reissued: June 10, 1966; November 30, 2011

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

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