<< >> NASA ASRS Report 402843, May 1998

A hawker 700 in initial climb at 12000 ft declared an emergency and diverted due to #1 engine inlet turbine temperature exceeded.

Attributes
ACN	402843
Time
Date	199805
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : eon
State Reference	IL
Altitude	msl bound lower : 12000 msl bound upper : 12000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau
Operator	general aviation : corporate
Make Model Name	HS 125 Series 700
Operating Under FAR Part	Part 91
Flight Phase	climbout : initial other other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 125 flight time total : 1775 flight time type : 100
ASRS Report	402843
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

During initial climb out, 80% power was only available without exceeding maximum continuous power. Itt indication kept rising and crew kept reducing power. Finally, we notified ZAU we would have to return to pwk airport. Power was reduced all the way to idle and itt indication was 1012 degrees C (maximum continuous setting is 885 degrees C). Crew elected to shut down #1 engine. No other abnormal indications. Emergency shutdown checklist was completed and ATC was notified of our emergency status. Radar vectors to ILS runway 16 at pwk. Landed without incident. Maintenance action was initiated. Findings were inconclusive. Engine manufacturer was notified and erroneous indication/itt indication and sensors to blame. Callback conversation with reporter revealed the following information: the reporter stated that maintenance found the inlet turbine indicator at fault and after replacement the engine checked ok.

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Original NASA ASRS Text

Title: A HAWKER 700 IN INITIAL CLB AT 12000 FT DECLARED AN EMER AND DIVERTED DUE TO #1 ENG INLET TURBINE TEMP EXCEEDED.

Narrative: DURING INITIAL CLBOUT, 80% PWR WAS ONLY AVAILABLE WITHOUT EXCEEDING MAX CONTINUOUS PWR. ITT INDICATION KEPT RISING AND CREW KEPT REDUCING PWR. FINALLY, WE NOTIFIED ZAU WE WOULD HAVE TO RETURN TO PWK ARPT. PWR WAS REDUCED ALL THE WAY TO IDLE AND ITT INDICATION WAS 1012 DEGS C (MAX CONTINUOUS SETTING IS 885 DEGS C). CREW ELECTED TO SHUT DOWN #1 ENG. NO OTHER ABNORMAL INDICATIONS. EMER SHUTDOWN CHKLIST WAS COMPLETED AND ATC WAS NOTIFIED OF OUR EMER STATUS. RADAR VECTORS TO ILS RWY 16 AT PWK. LANDED WITHOUT INCIDENT. MAINT ACTION WAS INITIATED. FINDINGS WERE INCONCLUSIVE. ENG MANUFACTURER WAS NOTIFIED AND ERRONEOUS INDICATION/ITT INDICATION AND SENSORS TO BLAME. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THAT MAINT FOUND THE INLET TURBINE INDICATOR AT FAULT AND AFTER REPLACEMENT THE ENG CHKED OK.

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.