Hi all,
I have experienced a similar problem twice within a week. Once on 767 (TAT) and once on 757 (F/O PITOT + R AUX PITOT).
During preflight, (on GND and Eng shutdown...
) F/O PITOT
and R AUX PITOT lights (overhead panel) not illuminated. No EICAS message except PROBE HEAT which is normal on GND with Engine Shutdown.
Probe heaters verified and ok by maintenance.
Do you GO?
MEL 30.31.02
Thanks