STC SA5475NM

This Certificate issued to United Air Lines, Inc.

600 Jefferson Street Houston, Texas 77002 Part 25* of the Federal Aviation Regulations. *Certification basis is set forth in Type Certificate Data Sheet A20WE.

Original Product Type Certificate Number : A20WE Make: Boeing Model: 747-422 Series Description of Type Design Change : Installation of ACARS Management Unit, Collins P/N 622-8910-108, with ATC data link capability, in accordance with FAA Approve d United Air Lines COA 8-3782 ER 1, Revision N/C, dated August 28, 1991 or later FAA approved revisions . FAA Approved United Air Lines SATCOM/ACARS to Boeing Airplane Flight Manual Supplement Document No . D6U10001, dated November 8, 1991, or later FAA approved revisions is required for this modification.

Limitations and Conditions: This approval should not be ex tended 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 a pproved modifications will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this STC must be included in the permanent records of the modified aircraft. 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 : August 1, 1991

Date of issuance : November 8, 1991

Date reissued : November 30, 2011

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

Transfer the ownership of Supplemental Type Certificate Number

to (Name of transferee)

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(City, State, and ZIP Code)

from (Name of grantor) (Print or type)

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Signature of grantor (In ink):

U.S. GPO 1987-763-28