What was found
GE DIAGNOSTICS REPORTS NR 2 ENGINE TREND DATA SHOWS A SUDDEN SHIFT IN EGT HOT DAY MARGIN ALL OTHER PARAMETERS NORMAL. EGT INDICATION ERRORS ARE SUSPECT ETOPS SIGNIFICANT SYSTEM REF ETOPS MANUAL SECTION E07 00 04PRIORITY 1. C/W FIM 77 21 00 810 803 F00. ENGINE 2 T495 SENSORS INITIAL READINGS: S1=134 S2=69 S3=99 S4=66. OPENED P6 2: D4 D6 D7 D8. CLEANED ENGINE 2 T495 SENSORS S1 S4. CLOSED P6 2: D4 D6 D7 D8. ENGINE 2 T495 SENSORS POST CLEANING READINGS: S1=36 S2=17 S3=22 S4=17. PERFORMED REPAIR CONFIRMATION.