As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ABOVE 10,000 FT, LT ENG INDICATIONS ABNORMAL, L FF 3.0 N3 79 N2 89 EGT 714 N1 67.2, R FF 8.9 N3 91 N2 71 EGT 489 N1 94.5 & L EFR 1.65 R EFR 1.61. THE FLIGHT DECLARED AN EMER & RETURNED TO FIELD. THE FLIGHT LANDED WITHOUT FURTHER INCIDENT. ACFT WAS REMOVED FROM SERVICE. R & R LT ENG P1 PROBE NOSE COWL IAW AMM 77-11-00. ACCOMPLISHED BOTH ENG RUN UPS TO HIGH POWER RUN, ALL PARAMETERS NORMAL.