Narrative:

Upon leveling off the autoplt was not maintaining the 14000 ft as selected. At 14100 ft I reselected 14000 ft and it corrected back down. Within seconds we were at 14400 ft when I said to the captain 'what is wrong with the autoplt; how come it won't hold altitude?' the captain then disconnected the autoplt and pitched down to correct for the uncommanded climb. The ride then went from smooth to violent. I pulled both throttles to idle as soon as I was able. It was so rough that it was impossible to control your arms and legs at times. Both of us hit our heads on the breaker panel above; which rung our bell so to speak. Initially I heard a hissing sound and thought decompression and mask. Then no mask we are only 14000 ft. The hissing was a burst beverage container or my mask out of its holster and purging; I don't know for sure. The captain had a severe cut on his head and was bleeding. He continued to fly and claimed to be ok. The airframe was covered with ice and a generator was offline. We reported our status with center and I believe they declared us an emergency aircraft. As PNF I activated the aircraft's ice protection which worked well. We began load reduction. I ran the appropriate checklist for the generator off and it was restored. The remaining flight was unremarkable. I reviewed the flight log and it indicated a maximum altitude loss of 2000 ft. This is my biggest concern. Maintaining wings level was a full time job during this event with severe turbulence and I commend my captain. I think good CRM probably saved our lives. During this event I found myself doing only the things that have been 'over-learned.' in the future I will pipe up and ask for deviations around all clouds when possible and if anyone is ever injured in-flight I will suggest the use of oxygen. We may need all the help we can get.

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Original NASA ASRS Text

Title: WW24 CREW ENCOUNTERS SEVERE TURB AND ICING AT 14000 FT.

Narrative: UPON LEVELING OFF THE AUTOPLT WAS NOT MAINTAINING THE 14000 FT AS SELECTED. AT 14100 FT I RESELECTED 14000 FT AND IT CORRECTED BACK DOWN. WITHIN SECONDS WE WERE AT 14400 FT WHEN I SAID TO THE CAPT 'WHAT IS WRONG WITH THE AUTOPLT; HOW COME IT WON'T HOLD ALT?' THE CAPT THEN DISCONNECTED THE AUTOPLT AND PITCHED DOWN TO CORRECT FOR THE UNCOMMANDED CLB. THE RIDE THEN WENT FROM SMOOTH TO VIOLENT. I PULLED BOTH THROTTLES TO IDLE AS SOON AS I WAS ABLE. IT WAS SO ROUGH THAT IT WAS IMPOSSIBLE TO CTL YOUR ARMS AND LEGS AT TIMES. BOTH OF US HIT OUR HEADS ON THE BREAKER PANEL ABOVE; WHICH RUNG OUR BELL SO TO SPEAK. INITIALLY I HEARD A HISSING SOUND AND THOUGHT DECOMPRESSION AND MASK. THEN NO MASK WE ARE ONLY 14000 FT. THE HISSING WAS A BURST BEVERAGE CONTAINER OR MY MASK OUT OF ITS HOLSTER AND PURGING; I DON'T KNOW FOR SURE. THE CAPT HAD A SEVERE CUT ON HIS HEAD AND WAS BLEEDING. HE CONTINUED TO FLY AND CLAIMED TO BE OK. THE AIRFRAME WAS COVERED WITH ICE AND A GENERATOR WAS OFFLINE. WE RPTED OUR STATUS WITH CTR AND I BELIEVE THEY DECLARED US AN EMER ACFT. AS PNF I ACTIVATED THE ACFT'S ICE PROTECTION WHICH WORKED WELL. WE BEGAN LOAD REDUCTION. I RAN THE APPROPRIATE CHKLIST FOR THE GENERATOR OFF AND IT WAS RESTORED. THE REMAINING FLT WAS UNREMARKABLE. I REVIEWED THE FLT LOG AND IT INDICATED A MAX ALT LOSS OF 2000 FT. THIS IS MY BIGGEST CONCERN. MAINTAINING WINGS LEVEL WAS A FULL TIME JOB DURING THIS EVENT WITH SEVERE TURB AND I COMMEND MY CAPT. I THINK GOOD CRM PROBABLY SAVED OUR LIVES. DURING THIS EVENT I FOUND MYSELF DOING ONLY THE THINGS THAT HAVE BEEN 'OVER-LEARNED.' IN THE FUTURE I WILL PIPE UP AND ASK FOR DEVS AROUND ALL CLOUDS WHEN POSSIBLE AND IF ANYONE IS EVER INJURED INFLT I WILL SUGGEST THE USE OF OXYGEN. WE MAY NEED ALL THE HELP WE CAN GET.

Data retrieved from NASA's ASRS site as of January 2009 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.