STC SA2756NM-D

United States of America Department of Transportation Federal Aviation Administration URRENDERED Supplemental Type Certificate 4.26-2009 Number: SA2756NN-D This certificate issued to: UNITED AIR LINES, INC.

Puri 25 of the FEDERAL AVIATION Regulations. SEE TYPE CERTIFICATE DATA SHEET A22WE FOR SPECIAL, CONDITIONS.

Original Product -Type Certificate Number: A22WE Make: McDONNELL-DOUGLAS Model: DC-10-10 Description of Type Design Change: INSTALLATION OF WIRING PROVISIONS FOR A SINGLE TRAFFI ALERT AND COLLISION AVOIDANCE SYSTEM (TCAS II). THE PROVISIONS WILL INCLUDE INTER-

CONNECT WIRING, CIRCUIT BREAKERS, MOUNTING TRAYS, ANTENNAE AND ANTENNA COAX CABLES, AND ICAS TYPE VERTICAL SPEED INDICATORS. IN ADDITION, A DUAL OPERATIONAL MODE S TRANSPONDER SYSTEM WILL BE INSTALLED. UNITED AIR LINES AFM SUPPLEMENT TO FAA APPROVED FLIGHT MANUAL MDC-J1010 DATED 7/27/90, OR LATER APPROVED REVISION, IS REQUIRED AS PART OF THIS INSTALLATION OF A DUAL OPERATIONAL MODE S TRANSPONDER SYSTEM.

THIS APPROVAL DOES NOT EXTEND TO OTHER AIRCRAFT OF THIS MODEL ON WHICH OTHER

PREVIOUSLY APPROVED MODIFICATIONS ARE INCORPORATED UNLESS IT IS DETERMINED BY THE

OTHER PREVIOUSLY APPROVED MODIFICATIONS WILL INTRODUCE NO ADVERSE EFFECT UPON THE AIRWORTHINESS OF THAT AIRCRAFT.

Date of Application: 5/30/89 Lute missid:

Date of Issuance: 8/7/89 Jatrumended: 7/27/90, 6/01/92 FEDERAL AVIATIO By Direction of the Administrator S. Pasterline R. M. Gasterline (Signature ) TOMINISTRATO DAS Staff Coordinator United Air Lines DAS l WE (Title)

47.