Part #: S72-1746




Sensor Systems


Directional Antenna

Part Number :




  • TCAS I Directional Antenna
  • Teardrop shaped
  • 2 TNC & 1 BNC Connector
  • Same as L3 Model: NY-164, P/N: 805-10890-001
  • Used in the SKY497 & SKY899 L3 Skywatch/Skywatch HP traffic alert systems
  • The S72-1746 can ONLY be used in the SKY899 system when set up as a TAS Installation, SKY899 TCAS I systems require the S72-1744 antenna
  • Sealed against environmental extremes
  • Are non-repairable
  • Must ensure a tight seal between the airframe & antenna
  • O-ring seal has been incorporated into the design to achieve a tight seal
  • To fit specific airframes, a special adapter plate is also required
  • Installation kits differ in the size of the airframe adapter plate, please confirm the install kit needed for your specific airframe



Size: 11.12"D x 6.23"W x 1.3"H Weight: 2.3 lbs.
Speed: Rated to 600 knots (0.9 Mach) @ 25,000 feet Frequency: 1030-1090 MHz
Operating Altitude: 55,000 feet max TSO Compliance: FAA TSO C118
RTCA Compliance: DO-160C FA-AC(CLMY)XSFDFSXXXXXXXL(2A)X Finish: Gloss White (17925) or Black (37038), Per Fed Std 595A
Part Number: Description:
S72-1746 Directional Antenna, Identical to L3 P/N: 805-10890-001


- TAS Antenna

NSN: 5985-01-687-5715

Price Condition Status

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In relation to NE (New) parts, many OEMs change their prices and availability without any notice to dealers or the industry. Therefore, through the REQUEST or RFQ indication, we ask that customers contact us for the most accurate price and availability.

In relation to SV & OH parts, the used parts aftermarket in the aviation industry is not an infinite supply. It is a dynamic, constantly changing market that is significantly affected by and susceptible to highs and lows in supply and demand. Therefore, although we attempt to, at times, we are unable to predict the exact moment when an item may be available. Once again, through the REQUEST or RFQ indication on our website, we ask that customers contact us for the most current and accurate price and availability.