Narrative:

Our airline uses average weights for people and bags. We were operating at approximately 75 pounds below our maximum gross weight. While descending through 14000 ft at approximately 250 KIAS the trim (red) light came on, on our alarm panel. There was also a trim (red) light on my first officer's flight control panel. (We were approximately 5 degrees down.) it seemed like a second had passed from when I saw the red light on the panel to when the autoplt disconnected. The aircraft pitched up to approximately 5-8 degrees positive (total pitch up approximately 10-13 degrees). It took my first officer and myself applying forward pressure on the yoke, to get the aircraft under control and back to level flight. The trim wheel was rolled forward to its most forward position. The power was reduced to give us an airspeed of approximately 200 KTS and a landing at avp was without problem. My flight attendant was hurt when we pushed the aircraft over. She felt and hurt her knee. After talking to our maintenance control people the autoplt trim system was deferred per the MEL. The trim wheel would only trim plus 1.3 units, when the other aircraft in our fleet (13 of them) go past 2, negative.

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Original NASA ASRS Text

Title: CABIN ATTENDANT BEHAVIOR PERSONAL INJURY SUFFERED AS LOSS OF ACFT CTL OCCURS AFTER ACFT EQUIP PROB MALFUNCTION IS EXPERIENCED.

Narrative: OUR AIRLINE USES AVERAGE WTS FOR PEOPLE AND BAGS. WE WERE OPERATING AT APPROX 75 LBS BELOW OUR MAX GROSS WT. WHILE DSNDING THROUGH 14000 FT AT APPROX 250 KIAS THE TRIM (RED) LIGHT CAME ON, ON OUR ALARM PANEL. THERE WAS ALSO A TRIM (RED) LIGHT ON MY FO'S FLT CTL PANEL. (WE WERE APPROX 5 DEGS DOWN.) IT SEEMED LIKE A SECOND HAD PASSED FROM WHEN I SAW THE RED LIGHT ON THE PANEL TO WHEN THE AUTOPLT DISCONNECTED. THE ACFT PITCHED UP TO APPROX 5-8 DEGS POSITIVE (TOTAL PITCH UP APPROX 10-13 DEGS). IT TOOK MY FO AND MYSELF APPLYING FORWARD PRESSURE ON THE YOKE, TO GET THE ACFT UNDER CTL AND BACK TO LEVEL FLT. THE TRIM WHEEL WAS ROLLED FORWARD TO ITS MOST FORWARD POS. THE PWR WAS REDUCED TO GIVE US AN AIRSPD OF APPROX 200 KTS AND A LNDG AT AVP WAS WITHOUT PROB. MY FLT ATTENDANT WAS HURT WHEN WE PUSHED THE ACFT OVER. SHE FELT AND HURT HER KNEE. AFTER TALKING TO OUR MAINT CTL PEOPLE THE AUTOPLT TRIM SYS WAS DEFERRED PER THE MEL. THE TRIM WHEEL WOULD ONLY TRIM PLUS 1.3 UNITS, WHEN THE OTHER ACFT IN OUR FLEET (13 OF THEM) GO PAST 2, NEGATIVE.

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.