STC SA02306NY

Number SA02306NY This certificate issued to Northrop Grumman Corporation California Microwave Systems 18450 Showalter Road Hagerstown, MD 21742

Part 23 of the Federal Aviation Regulations.

Original Product -- Type Certificate Number: A24CE Make: Raytheon Model: B300 Description of Type Design Change:

Upgrade of an existing Rockwell Collins TDR-94D Mode S Transponder system to comply with the European Elementary and Enhanced Surveillance requirements in accordance with Installation Drawing List 230101DL, Rev A, dated September 27, 2006.

1. Northrop Grumman Corp. Instructions for Continued Airworthiness, 230103ER, Revision A, dated July 21, 2006 is required for this installation.

2. Northrop Grumman Corp. Airplane Flight Manual Supplement, 230102ER, FAA approved on dated October 24, 2006 is required for this installation.

3. You can not use descriptive data about this design change to duplicate other products. This approval is limited to only the installation made in Raytheon, model B300, serial number FL-91. This STC does not permit manufacturing of parts for multiple installations.

4. The aircraft must be equipped with a previously approved Rockwell Collins TCAS-94 system consisting of Dual Mode S TDR- 94D Transponders, CTL-92 Control, CTL-TCAS Control, and TTR-4000 Processor, TRE-920 antennas and Transponder Omni directional antennas.

5. The aircraft must be modified by STC ST3018DE-A (Air Data Modification) for RVSM operations. This modification installs an ADC-87A Air Data Computer that is required for elementary and Enhanced Surveillance upgrades.

6. The aircraft has to have been modified with a previously approved Honeywell LASEREF V Inertial Reference Unit.

Date of application: April 24, 2006

Date of issuance: October 24, 2006 Date reissued :

( Signature) Anthony Socias Manager New York Aircraft Certification Office

(Title)