What was found
ORD - FLT 189 - EN ROUTE BOS-LAX - CARGO COMPARTMENT FIRE DETECTION SYSTEM INOPERATIVE. LANDED ORD WITHOUT INCIDENT. REPLACED AFT CARGO DET FAN 1. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ORD - FLT 189 - EN ROUTE BOS-LAX - CARGO COMPARTMENT FIRE DETECTION SYSTEM INOPERATIVE. LANDED ORD WITHOUT INCIDENT. REPLACED AFT CARGO DET FAN 1. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)