An EMB170 crew shut down an engine in-flight following the loss of throttle control. An emergency wa...

Attributes
ACN	687877
Time
Date	200602
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : zzz.tracon
State Reference	US
Altitude	msl single value : 18000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : zzz.tracon
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 170/175 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	arrival star : n/s
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument
Experience	flight time last 90 days : 260 flight time total : 4500 flight time type : 450
ASRS Report	687877
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 : eicas other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : landed in emergency condition
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

In cruise flight; I started noticing differences when comparing engine parameters. Engine #1 was falling short of its commanded power and there was a lag in throttle response. At FL300 at mach .75 (slowed slightly for light turbulence); the N1 and fuel flow were noticeably lower than engine #2. The itt and N2 speed were noticeably higher than engine #2. I recorded the numbers for a postflt briefing with maintenance. Approximately 80 NM northwest ZZZ at XA38Z we received the engine #1 control fault message. After following the QRH we determined loss of all throttle control to engine #1. The engine was running at approximately 27% N1. I informed ATC we would need vectors for holding at 10000 ft while we worked on a problem. At XA46Z I declared an emergency and briefed the flight attendants and passenger on the impending engine shutdown. After reviewing the QRH procedures for a precautionary engine shutdown; we proceeded and the engine responded to the start/stop selector and shut down normally.

Original NASA ASRS Text

Title: AN EMB170 CREW SHUT DOWN AN ENG INFLT FOLLOWING THE LOSS OF THROTTLE CTL. AN EMER WAS DECLARED.

Narrative: IN CRUISE FLT; I STARTED NOTICING DIFFERENCES WHEN COMPARING ENG PARAMETERS. ENG #1 WAS FALLING SHORT OF ITS COMMANDED PWR AND THERE WAS A LAG IN THROTTLE RESPONSE. AT FL300 AT MACH .75 (SLOWED SLIGHTLY FOR LIGHT TURB); THE N1 AND FUEL FLOW WERE NOTICEABLY LOWER THAN ENG #2. THE ITT AND N2 SPD WERE NOTICEABLY HIGHER THAN ENG #2. I RECORDED THE NUMBERS FOR A POSTFLT BRIEFING WITH MAINT. APPROX 80 NM NW ZZZ AT XA38Z WE RECEIVED THE ENG #1 CTL FAULT MESSAGE. AFTER FOLLOWING THE QRH WE DETERMINED LOSS OF ALL THROTTLE CTL TO ENG #1. THE ENG WAS RUNNING AT APPROX 27% N1. I INFORMED ATC WE WOULD NEED VECTORS FOR HOLDING AT 10000 FT WHILE WE WORKED ON A PROB. AT XA46Z I DECLARED AN EMER AND BRIEFED THE FLT ATTENDANTS AND PAX ON THE IMPENDING ENG SHUTDOWN. AFTER REVIEWING THE QRH PROCS FOR A PRECAUTIONARY ENG SHUTDOWN; WE PROCEEDED AND THE ENG RESPONDED TO THE START/STOP SELECTOR AND SHUT DOWN NORMALLY.

Data retrieved from NASA's ASRS site as of January 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.

An EMB170 crew shut down an engine in-flight following the loss of throttle control. An emergency was declared.