What was found
NR 1 OIL TEMP AT 114 DEG C DURING CLIMB. REFERENCED EMERGENCY CHECKLIST (CLOSED #2 BYPASS DOOR) OIL TEMP REDUCED TO 109 DEGREE C AT LEVEL OFF (FL 230) OIL TEMP NORMAL AT 90 DEGREES C. INTERROGATED CDS FOUND EXCEEDANCE TO BE 114.5 DEGREE C FOR 836 SECONDS. DETERMINED TO BE AREA A AS PER S-11-00-992-802. COMPLIED WITH ENGINE INSPECTION AFTER SUSTAINED RUNNING AT TEMP OUTSIDE OF SPECIFIED LIMITS. IAW TASK 05-33-00-210-814. FOUND ACOC FLAP DOOR ACTUATOR FAILED OPS TEST. REPLACED ACOC DOOR IAW DHC-8-400 MM TASK 79-21-31-000-801 AND 79-21-31-000-8021. GROUND RAN AIRCRAFT AT HIGH POWER FOR 15 MINUTES. OPERATIONAL CHECK AND LEAK CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.