<< >> NASA ASRS Report 992135, February 2012

After a B737-700 returned to land because of an abnormal N1 indication on takeoff; maintenance found a T12 inlet temperature probe fault.

Attributes
ACN	992135
Time
Date	201202
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Component
Aircraft Component	Turbine Engine
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

Returned to [the departure airport] after N1 abnormal indications on departure. After maintenance ran a check it was determined that a T12 malfunction was the cause of the abnormal indications. An overweight landing was logged at 129;000 pounds and a vsi sink of 50 FPM.

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Original NASA ASRS Text

Title: After a B737-700 returned to land because of an abnormal N1 indication on takeoff; maintenance found a T12 inlet temperature probe fault.

Narrative: Returned to [the departure airport] after N1 abnormal indications on departure. After maintenance ran a check it was determined that a T12 malfunction was the cause of the abnormal indications. An overweight landing was logged at 129;000 LBS and a VSI sink of 50 FPM.

Data retrieved from NASA's ASRS site as of July 2013 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.