Narrative:

We had a hydraulic system gauge fail, as well as the left xfer pump circuit breaker pop. Also, the aircraft had a vibration at the forward entry door lower panel -- all at the same time. The autoplt (left or #1) was engaged. We had advised center regarding the problems that we encountered. Without warning, the aircraft started climbing, autoplt still engaged. We disconnected the autoplt at FL222.5 -- approximately 250 ft above assigned altitude. I was busy looking for the circuit breakers to reset during the abnormal conditions. I could not think of anything else we could have done other than hand fly the airplane. We landed without incident. We also had to reduce our speed of 320 KTS to 270 KTS. The vibration quieted down at the slower speeds.

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Original NASA ASRS Text

Title: AN ACR FLC FLYING MD80 FAILS TO MAINTAIN ALT AS ASSIGNED BY ZKC ARTCC.

Narrative: WE HAD A HYD SYS GAUGE FAIL, AS WELL AS THE L XFER PUMP CIRCUIT BREAKER POP. ALSO, THE ACFT HAD A VIBRATION AT THE FORWARD ENTRY DOOR LOWER PANEL -- ALL AT THE SAME TIME. THE AUTOPLT (L OR #1) WAS ENGAGED. WE HAD ADVISED CTR REGARDING THE PROBS THAT WE ENCOUNTERED. WITHOUT WARNING, THE ACFT STARTED CLBING, AUTOPLT STILL ENGAGED. WE DISCONNECTED THE AUTOPLT AT FL222.5 -- APPROX 250 FT ABOVE ASSIGNED ALT. I WAS BUSY LOOKING FOR THE CIRCUIT BREAKERS TO RESET DURING THE ABNORMAL CONDITIONS. I COULD NOT THINK OF ANYTHING ELSE WE COULD HAVE DONE OTHER THAN HAND FLY THE AIRPLANE. WE LANDED WITHOUT INCIDENT. WE ALSO HAD TO REDUCE OUR SPD OF 320 KTS TO 270 KTS. THE VIBRATION QUIETED DOWN AT THE SLOWER SPDS.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.