A DC10 climbing through FL310 has a sudden 2 G pitch up exerted upon it. The aircraft's autoplt was ...

Attributes
ACN	403063
Time
Date	199805
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : lax
State Reference	CA
Altitude	msl bound lower : 31000 msl bound upper : 31000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla
Operator	common carrier : air carrier
Make Model Name	DC-10 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 60 flight time total : 8000 flight time type : 400
ASRS Report	403063
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 120 flight time total : 19000 flight time type : 6000
ASRS Report	403065
Events
Anomaly	inflight encounter other other anomaly
Independent Detector	other flight crewa other other : unspecified
Resolutory Action	flight crew : declared emergency none taken : unable other
Consequence	other

Narrative:

Aircraft pitched up. Captain disconnected autoplt and manually flew plane, some injuries. Callback conversation with reporter revealed the following information: reporter stated that maintenance control had called him. They stated that there had been an autoplt malfunction, the description of same escaped his technical expertise so he could not pass on any other pertinent information with regards to the equipment problem. He did state that the seat belt sign had been on, with the flight attendants standing in the galley, attending to some pre- service passenger duties. The injuries included some bone fractures of various sorts, including femurs, and some ankle and back injuries. All the flight attendants are recovering in an expected fashion. Supplemental information from acn 403065: in routine climb (500-700 FPM) aircraft pitched up (approximately 2 G's) hard. WX clear and smooth. All instruments (engine and flight) normal. 6-7 injuries in aft portion of aircraft. Returned to lax and fuel dump coordinated with center. Return uneventful. Medical assistance waiting at gate. Seat belt sign was on the duration of this flight. Supplemental information from acn 402925: some passenger and flight attendants were injured. Cause unknown. Flight from lax to hnl.

Original NASA ASRS Text

Title: A DC10 CLBING THROUGH FL310 HAS A SUDDEN 2 G PITCH UP EXERTED UPON IT. THE ACFT'S AUTOPLT WAS DISCONNECTED AND THE ACFT RETURNED TO LAX. 6-7 PAX AND FLT ATTENDANTS INJURED. A LOSS OF ACFT CTL.

Narrative: ACFT PITCHED UP. CAPT DISCONNECTED AUTOPLT AND MANUALLY FLEW PLANE, SOME INJURIES. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT MAINT CTL HAD CALLED HIM. THEY STATED THAT THERE HAD BEEN AN AUTOPLT MALFUNCTION, THE DESCRIPTION OF SAME ESCAPED HIS TECHNICAL EXPERTISE SO HE COULD NOT PASS ON ANY OTHER PERTINENT INFO WITH REGARDS TO THE EQUIP PROB. HE DID STATE THAT THE SEAT BELT SIGN HAD BEEN ON, WITH THE FLT ATTENDANTS STANDING IN THE GALLEY, ATTENDING TO SOME PRE- SVC PAX DUTIES. THE INJURIES INCLUDED SOME BONE FRACTURES OF VARIOUS SORTS, INCLUDING FEMURS, AND SOME ANKLE AND BACK INJURIES. ALL THE FLT ATTENDANTS ARE RECOVERING IN AN EXPECTED FASHION. SUPPLEMENTAL INFO FROM ACN 403065: IN ROUTINE CLB (500-700 FPM) ACFT PITCHED UP (APPROX 2 G'S) HARD. WX CLR AND SMOOTH. ALL INSTS (ENG AND FLT) NORMAL. 6-7 INJURIES IN AFT PORTION OF ACFT. RETURNED TO LAX AND FUEL DUMP COORDINATED WITH CTR. RETURN UNEVENTFUL. MEDICAL ASSISTANCE WAITING AT GATE. SEAT BELT SIGN WAS ON THE DURATION OF THIS FLT. SUPPLEMENTAL INFO FROM ACN 402925: SOME PAX AND FLT ATTENDANTS WERE INJURED. CAUSE UNKNOWN. FLT FROM LAX TO HNL.

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.

A DC10 climbing through FL310 has a sudden 2 G pitch up exerted upon it. The aircraft's autoplt was disconnected and the aircraft returned to lax. 6-7 passenger and flight attendants injured. A loss of aircraft control.