Narrative:

Climbing through 12000 ft, the #1 engine experienced an egt indication anomaly for 5-7 seconds. An upward spike to 1050 degrees C was followed by an immediate decline to zero of the analog pointer and blanking of digital display. N1, N2, ff and throttle angle remained constant. No yaw or compressor stall noted by pilots or flight attendants. Subsequent indications normal. Dispatch and maintenance control contacted in-flight. Maintenance control accessed ecm ACARS link data snapshot normal, but taken prior to event. Maintenance control advised engine inspect to occur at destination. Maintenance control line manager debriefed after arrival. Mr X, flight manager laxfo apprised. Human and aircraft factors: I delegated contact (continued from report #5) human and aircraft factors: I delegated contact with dispatch and maintenance control to first officer. The initial temperature conveyed to maintenance control and was in excess of 930 degrees C redline. Further discussion amongst ourselves clarified the exceedence at 1065 degrees C, maintenance control was advised. Per B737-300 flight handbook, the movement of egt pointer (non eis gauge) to zero and digital blanking is indicative of gauge or transmitter failure. Lessons: without prejudice toward a talented first officer, communication of critical data is more effectively accomplished by captain. The veracity of egt indicator coincident with possible failure created ambiguity and need for reference.

Related reports:

Google
 

Original NASA ASRS Text

Title: A B737-300 IN CLB AT 12000 FT HAD #1 ENG INDICATE A 5-7 SECOND EXHAUST GAS TEMP SPIKE TO 1050 DEGS. ALL OTHER INDICATIONS NORMAL.

Narrative: CLBING THROUGH 12000 FT, THE #1 ENG EXPERIENCED AN EGT INDICATION ANOMALY FOR 5-7 SECONDS. AN UPWARD SPIKE TO 1050 DEGS C WAS FOLLOWED BY AN IMMEDIATE DECLINE TO ZERO OF THE ANALOG POINTER AND BLANKING OF DIGITAL DISPLAY. N1, N2, FF AND THROTTLE ANGLE REMAINED CONSTANT. NO YAW OR COMPRESSOR STALL NOTED BY PLTS OR FLT ATTENDANTS. SUBSEQUENT INDICATIONS NORMAL. DISPATCH AND MAINT CTL CONTACTED INFLT. MAINT CTL ACCESSED ECM ACARS LINK DATA SNAPSHOT NORMAL, BUT TAKEN PRIOR TO EVENT. MAINT CTL ADVISED ENG INSPECT TO OCCUR AT DEST. MAINT CTL LINE MGR DEBRIEFED AFTER ARR. MR X, FLT MGR LAXFO APPRISED. HUMAN AND ACFT FACTORS: I DELEGATED CONTACT (CONTINUED FROM RPT #5) HUMAN AND ACFT FACTORS: I DELEGATED CONTACT WITH DISPATCH AND MAINT CTL TO FO. THE INITIAL TEMP CONVEYED TO MAINT CTL AND WAS IN EXCESS OF 930 DEGS C REDLINE. FURTHER DISCUSSION AMONGST OURSELVES CLARIFIED THE EXCEEDENCE AT 1065 DEGS C, MAINT CTL WAS ADVISED. PER B737-300 FLT HANDBOOK, THE MOVEMENT OF EGT POINTER (NON EIS GAUGE) TO ZERO AND DIGITAL BLANKING IS INDICATIVE OF GAUGE OR XMITTER FAILURE. LESSONS: WITHOUT PREJUDICE TOWARD A TALENTED FO, COM OF CRITICAL DATA IS MORE EFFECTIVELY ACCOMPLISHED BY CAPT. THE VERACITY OF EGT INDICATOR COINCIDENT WITH POSSIBLE FAILURE CREATED AMBIGUITY AND NEED FOR REF.

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.