As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE-OFF, ON CLIMB, THE CREW NOTICED A +/- 40 PERCENT TORQUE SURGE ON THE LT ENGINE TORQUE GAUGE. ALONG WITH THE TORQUE INDICATION THEY FELT THE SURGE OF THE LT ENGINE. THE CREW DID NOT NOTICE ANY OTHER ABNORMAL ENGINE INDICATIONS. AIRCRAFT RETURNED TO PIT, AIRCRAFT TAKEN OUT OF SERVICE IN PIT AT 1801(LT). PIT MECHANIC REMOVED AND REPLACED LT ENGINE TORQUE SENSOR, AND PCU. PERFORMED OPERATIONAL CHECK OF SYSTEM. AIRCRAFT RETURNED TO SERVICE 2-7-03.