Hello Captains,

I started to experience strange thing with 737-200.
For example I was assigned by ATC to climb and maintain 5000 after take of. Later on it clears me for FL230, so I adjust my altitude alert for that and start climbing. But after 10000 ft. I keep getting continuous altitude alert buzzer. If I drop it down to below 10000 and reset back to FL230 it stops. I couldn't find anything in the manuals about it. Is this some king of bug I am experiencing, or I am doing something wrong with climb configuration?  ::)
Anyone else has experience the same symptoms?

Regards, Viktor.