product image

Part #:

Model: GRA-55

OEM:

Garmin

Desc:

Radar Altimeter System

Part Number :


GRA 55
FEATURES
  • Radar Altimeter
  • Cost-sensitive solution for helicopter and GA aircraft based on the GRA 5500 architecture
  • All-digital design provides smooth, consistent readout
  • Highly accurate, rugged and reliable
  • Interfaces with the GI 205 stand-alone indicator, Garmin flight displays and 3rd party equipment
  • Optimal solution for operators equipping for NVIS operations
  • For Part 135 helicopter operators, the GRA 55 fulfills the radar altimeter equipage requirement established by the FAA for adoption by 4/24/17
  • Patented technology offers a simpler installation that can provide weight and cost savings by eliminating long lengths of antenna cabling
EQUIPMENT COMPATIBILITY
  • Compatible Garmin Flight Displays* (via ARINC 429):

*Requires software versions compatible with support for display of radar altimeter

SPECIFICATIONS

Physical Characteristics:
  • Unit Height (with mounting rack): 3.99” (101.3 mm)
  • Unit Width (with or without mounting rack): 3.02” (76.7 mm)
  • Unit Depth (with mounting rack and connector): 11.62” (295.2 mm)
  • Unit Depth (with mounting rack, connector and configuration module): 12.08” (306.9 mm)
  • Unit Weight (with mounting rack): 3.5 lbs (1.6 kg)
  • Typical Mating Circular Connector Weight: 0.13 lbs (0.06 kg)
  • Typical Mating RF Connector Weight (2X): 0.07 lbs (0.03 kg) (weight listed is for 2 connectors)
General Specifications:
  • Operational Temperature Range: -55° C to +85° C
  • Altitude Range: 25,000 ft maximum
  • Software Compliance: RTCA/DO-178B Level C
  • Hardware Compliance: Not Applicable - The GRA 55 does not contain any complex or programmable logic devices
  • Environmental Conditions: RTCA/DO-160F
Performance Specifications:
  • Altitude Accuracy: ± 1.5 ft (3 - 100 ft AGL); ± 2 % (> 100 - 2500 ft AGL)
  • Altitude Range: -20 - 2550 ft AGL
  • Altitude Alert Outputs Range: 0 - 2500 ft AGL
  • Altitude Output Time Constant: 0.1 second maximum
  • Transmitter Output: Frequency: 4.25 - 4.35 GHz "Gated" FMCW; Power: 1.0 W nominal
  • Horizontal Velocity: 0 - 200 knots maximum
  • Vertical Velocity: 20 ft/sec maximum (up to 100 ft AGL); 25 ft/sec maximum (above 100 ft AGL)
  • Pitch Angle: ± 20° maximum
  • Roll Angle: ± 20° maximum (with published altitude accuracy limits); ± 20° to ± 30° (with ± 20 % altitude accuracy limits throughout entire altitude range)
Power Requirements:
  • Supply Voltage: 14/28 VDC. See the Environmental Qualification Form for details on surge ratings and minimum/maximum operating voltages
  • Power Consumption: 13.75 W maximum (0.5 A at 27.5 VDC, 1.0 A at 13.75 VDC)

 

010-00946-05
- Radar Altimeter (Unit Only)
Price Condition Status
REQUEST NEW OUTRIGHT REQUEST LEAD TIME
010-01367-00
- Radar Altimeter R/T
Price Condition Status
REQUEST NEW OUTRIGHT REQUEST LEAD TIME
011-02537-05
- Radar Altimeter
Price Condition Status
REQUEST NEW OUTRIGHT REQUEST LEAD TIME
K10-00205-00
- Radar Altimeter System
Price Condition Status
REQUEST NEW OUTRIGHT REQUEST LEAD TIME
K10-00234-00
- Radio Altimeter Kit (w/o Indicator)
Price Condition Status
REQUEST NEW OUTRIGHT REQUEST LEAD TIME

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


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.