Part #:

Model: TTR-921

Collins Aerospace - TCAS Processor
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Part Number :


TTR-921
FEATURES
  • TCAS II Transmitter/Receiver
  • DO-185A (Change 7.0) software
  • NOTE: Change 7.1 logic standard on certain models & upgrade available on previous models - See P/N Chart below
  • Greater target location accuracy
  • ARINC 735A interfaces
  • Processor and memory to accommodate potential future "Free Flight" CNS/ATM requirements
  • 115 Vac/28 Vdc common power supply
  • Growth space for two additional modules in 6 MCU package, or optional 4 MCU size available
  • Top/Bottom Antenna switching circuitry
  • Can operate with no forced air cooling or internal cooling fans at reduced reliability levels 
  • Advisories can be displayed on various dedicated indicators depending on aircraft configuration requirements
  • Combine proven advanced technology components, high density circuit designs and comprehensive self-test circuitry to provide exceptionally reliable operation
SPECIFICATIONS
Weight: 18.2 lbs Dimensions: 7.62" H x 7.76" W x 12.56" L
TSO: C-119b Software: DO-178B Level B
EUROCAE: ED-14B Environmental: DO-160D[A2F2] BAB[SCLMY] EXXXXZ[BZ]AZC[WWP]M[Z3Z4]A
Temperature: -55 to +70°C  Altitude: 55,000 ft
Power Requirement: 28 Vdc 4A or 155 Vac 1A Transmitter Power Output: Variable, 400 W max
Transmitter Frequency:  1030 ± 0.01 MHz Receiver Sensitivity: -85dBm, ± 2dB
Receiver Frequency: 1090 ± 3 MHz Surveillance Range: 30 nmi, typical 14 nmi, minimum
Surveillance Capacity: 150 targets, 30 displayed Bearing Accuracy: 5° RMS, 10° peak on standard ground plane
Part NumberR/T Description:
822-1293-002 28 Vdc or 115 Vac, 6 MCU (can be upgraded to -033)
822-1293-033 Standard Version w/Change 7.1
822-1293-302 Helicopter Version (can be upgraded to -332)
822-1293-332 Helicopter Version w/Change 7.1

 

822-1293-001
- TCAS Processor
Price Condition Delivery
CALL OR RFQ CALL OR RFQ CALL OR RFQ

SEA Repair Capabilities: No

822-1293-002
- TCAS Processor
Price Condition Delivery
CALL OR RFQ SV OUTRIGHT RFQ
CALL OR RFQ SV EXCHANGE RFQ

SEA Repair Capabilities: No

822-1293-003
- TCAS Processor
Price Condition Delivery
CALL OR RFQ OH OUTRIGHT RFQ

SEA Repair Capabilities: No

822-1293-033
- TCAS II Processor (Change 7.1) AC/DC
Price Condition Delivery
CALL OR RFQ SV OUTRIGHT RFQ

SEA Repair Capabilities: No

822-1293-220
- TCAS Processor
Price Condition Delivery
CALL OR RFQ CALL OR RFQ CALL OR RFQ

SEA Repair Capabilities: No

822-1293-302
- TCAS II Processor (Change 7, Helo)
Price Condition Delivery
CALL OR RFQ NEW OUTRIGHT RFQ

SEA Repair Capabilities: No

822-1293-320
- TCAS Processor
Price Condition Delivery
CALL OR RFQ CALL OR RFQ CALL OR RFQ

SEA Repair Capabilities: No

822-1293-321
- TCAS Processor
Price Condition Delivery
CALL OR RFQ CALL OR RFQ CALL OR RFQ

SEA Repair Capabilities: No

822-1293-322
- TCAS Processor
Price Condition Delivery
CALL OR RFQ CALL OR RFQ CALL OR RFQ

SEA Repair Capabilities: No

822-1293-332
- TCAS II Processor (Change 7.1, Helo)
Price Condition Delivery
CALL OR RFQ CALL OR RFQ CALL OR RFQ

SEA Repair Capabilities: No

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

TCAS II Version 7.1 mainly incorporates two important changes in relation to resolution advisory thresholds and pilot commands.

The first important change involves the monitoring of Resolution Advisory (RA) compliance. That is, when a TCAS II detects after a certain period of time that an aircraft is not responding correctly to the RA, a reversal RA will be triggered to immediately adjust to the other aircraft not complying with the RA.

The second change relates to the "Adjust Vertical Speed" RA issued by the TCAS that requires the decrease in VS to 2000, 1000, 500, or 9 feet per minute. In some cases, pilots were increasing their vertical speed instead of decreasing it. Some aviation representatives concluded that the "Adjust Vertical Speed" aural alert was not direct enough even though the visual RA was present as well. As a result, instead of retraining crews on TCAS procedures, the "Adjust Vertical Speed" RA is replaced with a simple "Level Off" RA. The RA display visually depicts the same "Level Off" command.

Utilizing more than one antenna to improve the quality and reliability of radio signal is called antenna diversity.

Heavy and/or faster aircraft utilize top and bottom antenna configurations to eliminate the possibility of signal blind spots caused by shadowing. Lighter, slower general aviation aircraft typically only have 1 antenna and do not require antenna diversity. Although not completely uniform, the transmission pattern of a typical antenna provides adequate radiation above and below in relation to most GA aircraft even when the antenna is on the bottom of the aircraft.