Large transport aircraft encountering turbulence. Captain reporter took over flying from the flying first officer. Captain disconnected both autoplt and autothrottles, descended to 31000 ft, reconnected autoplt, aircraft leveled and captain gave the flying back to first officer. First officer was not aware that the autothrottles were still disconnected until stick shaker went off indicating approach to a stall. Both flight crew were distracted with other things at the time.

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Attributes
ACN	350869
Time
Date	199610
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : n90
State Reference	NY
Altitude	msl bound lower : 30700 msl bound upper : 31000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : n90
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other descent other
Route In Use	enroute airway : n90
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : cfi pilot : atp
Experience	flight time last 90 days : 200 flight time total : 20000 flight time type : 2000
ASRS Report	350869
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 4200 flight time type : 475
ASRS Report	350868
Events
Anomaly	altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Encountered moderate turbulence at FL390. Autoflt having difficulty with turbulence. I took airplane and disconnected autoplt and autothrottles. Started manual descent to FL310. In mid descent I returned aircraft to copilot (his leg to fly) and reconnected autoplt. Aircraft leveled at FL310 on autoplt with throttles at idle. I turned in my seat to answer some operational questions from flight attendant who had come into cockpit, plus I had a manual on my lap and was troubleshooting a minor system problem. Stick shaker went off, I turned around, recognized impending stall (airspeed at 150 KTS) and executed stall recovery maneuver. We lost 200-300 ft during recovery.

Original NASA ASRS Text

Title: LGT ACFT ENCOUNTERING TURB. CAPT RPTR TOOK OVER FLYING FROM THE FLYING FO. CAPT DISCONNECTED BOTH AUTOPLT AND AUTOTHROTTLES, DSNDED TO 31000 FT, RECONNECTED AUTOPLT, ACFT LEVELED AND CAPT GAVE THE FLYING BACK TO FO. FO WAS NOT AWARE THAT THE AUTOTHROTTLES WERE STILL DISCONNECTED UNTIL STICK SHAKER WENT OFF INDICATING APCH TO A STALL. BOTH FLC WERE DISTRACTED WITH OTHER THINGS AT THE TIME.

Narrative: ENCOUNTERED MODERATE TURB AT FL390. AUTOFLT HAVING DIFFICULTY WITH TURB. I TOOK AIRPLANE AND DISCONNECTED AUTOPLT AND AUTOTHROTTLES. STARTED MANUAL DSCNT TO FL310. IN MID DSCNT I RETURNED ACFT TO COPLT (HIS LEG TO FLY) AND RECONNECTED AUTOPLT. ACFT LEVELED AT FL310 ON AUTOPLT WITH THROTTLES AT IDLE. I TURNED IN MY SEAT TO ANSWER SOME OPERATIONAL QUESTIONS FROM FLT ATTENDANT WHO HAD COME INTO COCKPIT, PLUS I HAD A MANUAL ON MY LAP AND WAS TROUBLESHOOTING A MINOR SYS PROB. STICK SHAKER WENT OFF, I TURNED AROUND, RECOGNIZED IMPENDING STALL (AIRSPD AT 150 KTS) AND EXECUTED STALL RECOVERY MANEUVER. WE LOST 200-300 FT DURING RECOVERY.

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.