EXTENDER BOX/RADIO ALTIMETER REC
This equipment is used in place of a radio altimeter receiver/transmitter (primarily Honeywell Model ALA-52B, Series RA RT) such as part number 066-50007-0101, for testing. C34005 permits an external radio altitude signal input on ARINC429 bus 1 and/or bus 2 during warning system, electronic flight instrument system (EFIS), radio altimeter (RA) system, traffic alert and collision avoidance system (TCAS), or ground proximity warning system (GPWS) maintenance tests.