verify your RDR altimeter is on to enable RALT AP mode

[Rongor]

Yesterday I was flying stable level flight, 300 kts, below 5000 ft. RALT refused to get selected. Only BALT was available. Under no circumstance could I get RALT activated. Any idea what could be wrong?

Edited November 8, 2021 by Rongor
made the probable issue clear in the thread topic

[Tholozor]

Did you turn the radar altimeter on? I know, kind of a 'duh' question, but we gotta cover the bases.

Edited November 8, 2021 by Tholozor

[Rongor]

I can't reproduce it anymore now in SP. Happened on a MP server. Your suggestion so far might still be the probable cause, which would be a shame.

[Harker]

Never mind, I can't read.