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Part #: 805-10003-001

Model: NY-156




Extant Aerospace


Directional Antenna (TCAS I)

Part Number :




Packaged Weight: 3.3 Pounds Packaged Dimensions: 13.4 (L) x 9.9 (W) x 4.3 (H) Inches


Part Number: Description:
805-10003-001 Directional Antenna (TCAS I)


Serial # S00574
Condition NEW
Mods -
Tag Date 04/16/24
Shop Textron Aviation Inc.
Warranty 1 Year
- Directional Antenna (TCAS I)

NSN: 5985-01-554-8890

Price Condition Status

Click on a question below to see the answer. If you have a question about this model that is not answered below, please contact

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.

While most TCAS I and TCAS II antennas are manufactured by Sensor Systems for other manufacturers, they all possess different part numbers and models numbers. Some even will indicate a Sensor Systems part number. However, that number indicates proprietary part number and status that Sensor Systems will have with the manufacturers such as Honeywell and L3. You cannot purchase the TCAS antenna with the Sensor Systems part number direct from Sensor Systems.

Regarding interchangeability, there are very similar characteristics between the various TCAS antennas. However, it is not so much the functionality characteristics that determine the interchangeability as it is the certification. That is, since an L3 antenna part number will not be listed in a Honeywell TCAS STC installation manual, you cannot substitute one for the other.
In order for the Skywatch / Skywatch HP NY-156 or NY-164 antenna to fit on specific airframes, an adapter plate may be required. Specific part number installation kits with the necessary adapter plates are available. Please refer to the following chart for aircraft applications and kit part numbers.

See chart below or view in PDF format: NY-156 Antenna Airframe Installation Kits (PDF)