As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/ABE - FLT 6253 - DURING CRUISE AT 2310 HOURS ON 5-15-97, MADE A SCHEDULED LANDING AT ABE WITH ONE DISCREPANCY WHICH WAS LT ENGINE RPM FAILED IN-FLIGHT. AIRCRAFT WENT TO THE GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED TACHOMETER GENERATOR. OPS CHECK OK. AIRCRAFT RELEASED AND RETURNED TO SERVICE. (X)