As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURNG A ROUTINE INSPECTION, THE LEFT OIL LINE FROM THE OIL COOLER WAS FOUND CHAFED ON THE LEFT AND RIGHT ENGINES. FOUND INSTALLATION TO BE PRE MOD 8/0642. REMOVED AND REPLACED LEFT OIL COOLER LINES ON THE LEFT AND RIGHT ENGINES WITH POST MOD 8/0642 LINES AND COUPLINGS IAW DHC MM, LEAK CHECK GOOD. A/C RETURNED TO SERVICE. (M)