Part #:

Model: DA-1203A




Radar Antenna

Part Number :

  • Bendix Radar Antenna Drive Unit used with various Bendix 3-piece, higher power color and monochrome radar systems
  • Motor driven with line-of-sight stabilization
  • Selectable scans of 120 deg. or 60 deg. sector
  • Mates with 10,12, or 18 inch flat-plate phase arrays
  • Models available with standard or inverted mounting and standard mounting with counterbalance for high vibration (see table below)



Antenna Scan Rate: 24 deg. / second Weight: 10“=7.4 lbs.; 12“=7.6 lbs.; 15“=9.5 lbs.; 18“=11.7 lbs. (approx.)
Stabilization Type: Line-of-Sight Stabilization Range: Manual tilt +-15 deg.; 120 deg. Scan= +-30 deg. combined pitch, roll and tilt
Stabilization Accuracy: +-1 deg. Antenna Gain: 12"=28.5 dB; 15"=30.6 dB; 18"=31.5 dB
Pressurization: None required TSO: C63b DO-138 Env. Cat. AAJAAXXXXXX
Part Number: Description:
4000504-0301 Standard mounting with features as listed above
4000504-0302 Inverted mounting with features as listed above
4000504-0303 Standard mounting with counterbalance for high vibration


- Radar Antenna

NSN: 5985-01-009-2872

Price Condition Status
- Radar Antenna
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.

No, the AA-1218A, AA-4518A, and AA-5518A can be used with any version of the DA-1203A. However, it is recommended to use the 4000504-0303 (common) or 4000504-0307 (Canadian military) versions of the DA-1203A when an 18 inch array is used in a high vibration environment.
The DA-1203A can be returned to service as inspected or repaired by SEA, following instructions provided by the current DA-1203A maintenance manual.

If the DA-1203A is to be installed into a Eurocopter, according to the Eurocopter Service Bulletin (AS365 34.00.29), it is recommend that the unit be inspected per the Telephonics Service Letter (SL-T-08-0001, April 2008). The service letter has been incorporated into the current DA-1203A Maintenance Manual. The maintenance manual recommends that the unit be inspected for preventive maintenance every 3 years or 3000 hours whichever comes first.

SEA complies with the DA-1203A maintenance manual, and in turn complies with the inspection procedure cited in the Eurocopter Service Bulletin.