Air carrier widebody transport approached a stall climbing through FL300 on autoplt.

Attributes
ACN	199924
Time
Date	199201
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : jfk
State Reference	NY
Altitude	msl bound lower : 30000 msl bound upper : 30000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : atlantic enroute : other oceanic enroute airway : a523
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : atp pilot : instrument
Experience	flight time last 90 days : 190 flight time total : 10356 flight time type : 1110
ASRS Report	199924
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 200 flight time total : 18000 flight time type : 400
ASRS Report	199751
Events
Anomaly	inflight encounter other non adherence : published procedure other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Aircraft was climbing through FL290 when captain who was PF had to leave cockpit to respond to an urgent call of nature. Control of aircraft was transferred to me. Aircraft was stable and on climb schedule. Climbing through FL300 encountered some turbulence (moderate chop). Airspeed began to decrease rapidly. Noticed vibration in the airframe and released autoplt, brought aircraft nose to horizon, selected maximum continuous thrust, recovered airspeed. Flight continued uneventfully to destination. Suspected cause is vertical wind shear with significant down draft.

Original NASA ASRS Text

Title: ACR WDB APCHED A STALL CLBING THROUGH FL300 ON AUTOPLT.

Narrative: ACFT WAS CLBING THROUGH FL290 WHEN CAPT WHO WAS PF HAD TO LEAVE COCKPIT TO RESPOND TO AN URGENT CALL OF NATURE. CTL OF ACFT WAS TRANSFERRED TO ME. ACFT WAS STABLE AND ON CLB SCHEDULE. CLBING THROUGH FL300 ENCOUNTERED SOME TURB (MODERATE CHOP). AIRSPD BEGAN TO DECREASE RAPIDLY. NOTICED VIBRATION IN THE AIRFRAME AND RELEASED AUTOPLT, BROUGHT ACFT NOSE TO HORIZON, SELECTED MAX CONTINUOUS THRUST, RECOVERED AIRSPD. FLT CONTINUED UNEVENTFULLY TO DEST. SUSPECTED CAUSE IS VERT WIND SHEAR WITH SIGNIFICANT DOWN DRAFT.

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.