Installation Manual

THALES Communications
OIM
AHV1600-SYSTEM
Page 302
July 16/09
6. DEFAULT OPERATING INSTRUCTIONS
Default Possible cause Corrective action
No output data - Radar altimeter not powered
- Radar altimeter power supply failure
- wiring
- Check circuit breaker
- Change power supply module
- Check wiring
Output data with Failure Warn-
ing status
- Radar altimeter failure - Change transceiver
Output data with No Computed
Data indication
- Loss of system sensitive when heli-
copter on ground or flying in the equip-
ment operating range
- Check antennae installation
- Change transceiver
7. OPERATIONAL LEVEL MAINTENANCE TASK
The Operational level maintenance task consists in removing and replacing the transceiver (LRU) in case of
failure.
A. REMOVING THE TRANSCEIVER
Recommended removing flowchart:
– power-off the transceiver,
– disconnect the three cables from front panel,
– remove the four M6 screws which secure the unit onto the aircraft structure,
– remove the unit.
B. INSTALLING THE SPARE TRANSCEIVER
Refer to INSTALLATION § 2
Before installing the spare Transceiver, ensure the Transceiver location on aircraft structure is clean.