STC SA2755CE-D

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA2755CE-D This certificate issued to: Duncan Aviation, Inc.

3701 Aviation Road Lincoln, NE 68524 Certifies that the change in the type design for the following produd with the linitations and condition Wherefore us specified hereon meets the nirvertlinesi reyuirements of Purt 25 of the Federal Aviation Porgulations.

Griginal Froud--Type Girlificate Number: A10CE Learjet Model: 55 Description of Type Design Change: Installation of Collins TCAS-94 Traffic and Collision Avoidance System with Collins TDR-94D Mode-S Transponder (2 ea.) Data required: (1) Duncan Aviation, Inc., Document List No. 10039400, Revision A, dated August 21, 1991, (2) Duncan Aviation, Inc., Document No.

40125400, FAA Approved Airplane Flight Manual Supplement, dated August 22, 1991, or later FAA approved revisions to (1) or (2).

Sunitations and Senditied: This approval should not extend to other specific airplanes of this model on which other previously approved modifications are incorporated, unless it is determined the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of the airplane.

suspended, revched or a termination dube is cheruise estublished by the Administrator of the Federal Aviulion Adeninistration Date of Application: July 17, 1991 Date Reissued: Februaty 23, 2010 Date of Issuance: August 22, 1991 Date Amended:

FEDERAL AVIATION By Direction of the Administrator Kath. Cats (Signature) P. Mike Chick, Jr.

TOMINISTRATOS ODA administrator, ODA-501013-CE Duncan Aviation, Lincoln, Nebraska (Title) le of not exceeding $1,000, or imprisonment not exceeding 3 yeers, or both.