G200 flight crew experiences itt exceedance climbing to FL400. Thrust is immediately reduced to brin...

Narrative:

About 15-20 minutes into the flight; while climbing through 38;500 ft to FL400 the EICAS itt for the left engine indicated 902C (flashing red). N1 was indicating 103.1 with a 104.0 limit and OAT was -46C. The thrust levers were set at maximum climb at the time. The thrust was immediately reduced; attaining normal parameters. No other abnormal readings were indicated. Engine event buttons were pressed. I estimate the [parameters were exceeded for] approximately 3 seconds. After contacting company and conferring with maintenance control; it was decided to divert to ZZZ which allowed us to safely prepare for the diversion in an unrushed manner. We also briefed possible scenarios in case we would encounter problems with the left engine before landing. The flight safely terminated at ZZZ with no further issues. All procedures and profiles were complied with and we have no clue as to why the itt was exceeded. The event does however emphasize the need for continued visual monitoring since there was no aural warning.

Original NASA ASRS Text

Title: G200 flight crew experiences ITT exceedance climbing to FL400. Thrust is immediately reduced to bring ITT below limits and after a discussion with the company the crew diverts to a suitable airport for maintenance.

Narrative: About 15-20 minutes into the flight; while climbing through 38;500 FT to FL400 the EICAS ITT for the left engine indicated 902C (flashing red). N1 was indicating 103.1 with a 104.0 limit and OAT was -46C. The thrust levers were set at maximum climb at the time. The thrust was immediately reduced; attaining normal parameters. No other abnormal readings were indicated. Engine event buttons were pressed. I estimate the [parameters were exceeded for] approximately 3 seconds. After contacting company and conferring with Maintenance Control; it was decided to divert to ZZZ which allowed us to safely prepare for the diversion in an unrushed manner. We also briefed possible scenarios in case we would encounter problems with the left engine before landing. The flight safely terminated at ZZZ with no further issues. All procedures and profiles were complied with and we have no clue as to why the ITT was exceeded. The event does however emphasize the need for continued visual monitoring since there was no aural warning.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	932233
Time
Date	201102
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Gulfstream G200 (IAI 1126 Galaxy)
Operating Under FAR Part	Part 91
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Turbine Engine
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe

G200 flight crew experiences itt exceedance climbing to FL400. Thrust is immediately reduced to bring itt below limits and after a discussion with the company the crew diverts to a suitable airport for maintenance.