#2 autothrottle malfunctions on B767-200ER. Engine responds normally to manual inputs.

Attributes
ACN	771712
Time
Date	200801
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : jfk.airport
State Reference	NY
Altitude	msl single value : 1200
Environment
Weather Elements	Rain
Light	Night
Aircraft 1
Controlling Facilities	tracon : n90.tracon
Operator	common carrier : air carrier
Make Model Name	B767-200
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	771712
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem flight crew : overrode automation
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

After takeoff in moderate rain; at approximately 1200 ft MSL; #2 engine rolled back in conjunction with #2 autothrottle. All engine indications appeared normal (ie; pressures; temperature; etc) and since the throttle position came back; I pushed the throttle back into position and engine functioned normal with no further evidence of an engine issue. We leveled at 11000 ft (I believe) as requested by ATC and the first officer and I made a thorough audit for engine anomalies with nothing as showing as obvious. We continued the climb with no further indications until descent when again the #2 throttle rolled almost all the to zero thrust out of sequence with #1. It also was a bit slow to accelerate. It did; however; work normal after a little push on the throttle. No further indications were noticed.

Original NASA ASRS Text

Title: #2 AUTOTHROTTLE MALFUNCTIONS ON B767-200ER. ENGINE RESPONDS NORMALLY TO MANUAL INPUTS.

Narrative: AFTER TKOF IN MODERATE RAIN; AT APPROX 1200 FT MSL; #2 ENG ROLLED BACK IN CONJUNCTION WITH #2 AUTOTHROTTLE. ALL ENG INDICATIONS APPEARED NORMAL (IE; PRESSURES; TEMP; ETC) AND SINCE THE THROTTLE POS CAME BACK; I PUSHED THE THROTTLE BACK INTO POS AND ENG FUNCTIONED NORMAL WITH NO FURTHER EVIDENCE OF AN ENG ISSUE. WE LEVELED AT 11000 FT (I BELIEVE) AS REQUESTED BY ATC AND THE FO AND I MADE A THOROUGH AUDIT FOR ENG ANOMALIES WITH NOTHING AS SHOWING AS OBVIOUS. WE CONTINUED THE CLB WITH NO FURTHER INDICATIONS UNTIL DSCNT WHEN AGAIN THE #2 THROTTLE ROLLED ALMOST ALL THE TO ZERO THRUST OUT OF SEQUENCE WITH #1. IT ALSO WAS A BIT SLOW TO ACCELERATE. IT DID; HOWEVER; WORK NORMAL AFTER A LITTLE PUSH ON THE THROTTLE. NO FURTHER INDICATIONS WERE NOTICED.

Data retrieved from NASA's ASRS site as of May 2009 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.