Incident Happens on 26th of March 2011 Near Sofia.
A Qatar Airways Airbus A300-600, registration A7-ABX performing freight flight QR-6036 from Milano Malpensa (Italy) to Doha (Qatar) with inflammable cargo, was enroute at FL310 about 65nm northwest of Sofia (Bulgaria) when the crew reported a fire indication for the right hand engine (PW4158) and decided to divert to Sofia. The airplane landed safely in Sofia about 30 minutes later.
The airport reported that emergency services had taken all necessary precautions because of the inflammable cargo. On approach no fire was observed from the engine.
Source :
Incident: Qatar A306 near Sofia on Mar 26th 2011, engine fire indication