Narrative:

While cruising at FL310, ATC requested a left turn for traffic to a heading of 310 degrees (a 30 degree left turn). While the aircraft was turning, I looked down to the right to place my cup in the cup holder. I heard a click. When I looked at the instrument panel, the autoplt had disengaged and the aircraft was in a descending left bank. I immediately took manual control of the aircraft and rolled the wings level and applied back pressure to return the aircraft to the assigned altitude. I leveled off and re-engaged the autoplt. A while later, ord flight attendant reported she had fallen exiting the aft lavatory and hit the arm rest on an aisle seat. She said it was a minor injury, but hurt. Captain advised her to write it up and check with medical upon arrival at ord. Supplemental information from acn 499792: in cruise, I had just come out of the forward lavatory when I felt a 1-G pull. I held on until I could get into the cockpit. The autoplt had evidently disconnected in a turn and the first officer had recovered. Flight attendant #4, ord based, suffered minor injuries. Refer to first officer as soon as possible for details.

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Original NASA ASRS Text

Title: FO DISTR WHEN AUTOPLT CLICKED OFF, CAUSING TURN AND DSCNT. PIC OUT OF COCKPIT. FLT ATTENDANT INJURY.

Narrative: WHILE CRUISING AT FL310, ATC REQUESTED A L TURN FOR TFC TO A HDG OF 310 DEGS (A 30 DEG L TURN). WHILE THE ACFT WAS TURNING, I LOOKED DOWN TO THE R TO PLACE MY CUP IN THE CUP HOLDER. I HEARD A CLICK. WHEN I LOOKED AT THE INST PANEL, THE AUTOPLT HAD DISENGAGED AND THE ACFT WAS IN A DSNDING L BANK. I IMMEDIATELY TOOK MANUAL CTL OF THE ACFT AND ROLLED THE WINGS LEVEL AND APPLIED BACK PRESSURE TO RETURN THE ACFT TO THE ASSIGNED ALT. I LEVELED OFF AND RE-ENGAGED THE AUTOPLT. A WHILE LATER, ORD FLT ATTENDANT RPTED SHE HAD FALLEN EXITING THE AFT LAVATORY AND HIT THE ARM REST ON AN AISLE SEAT. SHE SAID IT WAS A MINOR INJURY, BUT HURT. CAPT ADVISED HER TO WRITE IT UP AND CHK WITH MEDICAL UPON ARR AT ORD. SUPPLEMENTAL INFO FROM ACN 499792: IN CRUISE, I HAD JUST COME OUT OF THE FORWARD LAVATORY WHEN I FELT A 1-G PULL. I HELD ON UNTIL I COULD GET INTO THE COCKPIT. THE AUTOPLT HAD EVIDENTLY DISCONNECTED IN A TURN AND THE FO HAD RECOVERED. FLT ATTENDANT #4, ORD BASED, SUFFERED MINOR INJURIES. REFER TO FO ASAP FOR DETAILS.

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.