<< >> NASA ASRS Report 531574, November 2001

Involuntary engine rollback during high altitude climb by CL65. Problem went away on its own during descent and discussing matter with company maintenance.

Attributes
ACN	531574
Time
Date	200111
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : avp.airport
State Reference	PA
Altitude	msl single value : 26000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob.artcc
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 200 flight time total : 11000 flight time type : 1600
ASRS Report	531574
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : engine power ind other flight crewa
Resolutory Action	aircraft : equipment problem dissipated controller : issued new clearance other
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Climbing on center control. At approximately FL260, left engine was observed to lose thrust from about 88% N1 to 54% N1, descending to driftdown altitude. Contacted our dispatch and maintenance. While talking to maintenance, the engine came back to normal on its own. Remainder of flight was accomplished with no further problems.

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Original NASA ASRS Text

Title: INVOLUNTARY ENG ROLLBACK DURING HIGH ALT CLB BY CL65. PROB WENT AWAY ON ITS OWN DURING DSCNT AND DISCUSSING MATTER WITH COMPANY MAINT.

Narrative: CLBING ON CTR CTL. AT APPROX FL260, L ENG WAS OBSERVED TO LOSE THRUST FROM ABOUT 88% N1 TO 54% N1, DSNDING TO DRIFTDOWN ALT. CONTACTED OUR DISPATCH AND MAINT. WHILE TALKING TO MAINT, THE ENG CAME BACK TO NORMAL ON ITS OWN. REMAINDER OF FLT WAS ACCOMPLISHED WITH NO FURTHER PROBS.

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.