An Air Serbia Airbus A319-100, registration YU-APD performing flight JU-142 from Belgrade (Serbia) to Budapest (Hungary) with 67 passengers and 5 crew, was climbing out of Belgrade's runway 30 when the crew stopped the climb at FL190 after hearing noise from the left hand engine (V2524) and observed abnormal indications from the engine. The crew worked the related checklists and decided to return to Belgrade, where the aircraft landed safely on runway 30 about 35 minutes after departure.
On Jan 15th 2025 Serbia's Traffic Accident Investigation Center (STAIC) reported the aircraft was climbing through about 9460 feet MSL when a loud noise from the direction of the left hand engine occurred associated with the indication of a problem with the left hand engine. After working the checklists the crew returned the aircraft to Belgrade. During post flight inspection ground personnel discovered damage to the left hand engine, in particular the inner casing of the right reverser of the left hand engine. STAIC investigators determined the reverser was missing an area of about 1 by 2 meters, which had separated and fallen off in flight. The occurrence was rated a serious incident and is being investigated.
On Jun 2nd 2026 Serbia's CINS released their final report in Serbian only (Editorial note: to serve the purpose of global prevention of the repeat of causes leading to an occurrence an additional timely release of all occurrence reports in the only world spanning aviation language English would be necessary, a Serbian only release does not achieve this purpose as set by ICAO annex 13 and just forces many aviators to waste much more time and effort each in trying to understand the circumstances leading to the occurrence. Aviators operating internationally are required to read/speak English besides their local language, investigators need to be able to read/write/speak English to communicate with their counterparts all around the globe).
The report concludes the most probable causes of the serious incident were:
Immediate cause:
The damage was the direct result of thermal impact caused by the 10th stage bleed valve (HBV) remaining in the open position.
Indirect cause:
Failure of the solenoid valves.
On Jan 15th 2025 Serbia's Traffic Accident Investigation Center (STAIC) reported the aircraft was climbing through about 9460 feet MSL when a loud noise from the direction of the left hand engine occurred associated with the indication of a problem with the left hand engine. After working the checklists the crew returned the aircraft to Belgrade. During post flight inspection ground personnel discovered damage to the left hand engine, in particular the inner casing of the right reverser of the left hand engine. STAIC investigators determined the reverser was missing an area of about 1 by 2 meters, which had separated and fallen off in flight. The occurrence was rated a serious incident and is being investigated.
On Jun 2nd 2026 Serbia's CINS released their final report in Serbian only (Editorial note: to serve the purpose of global prevention of the repeat of causes leading to an occurrence an additional timely release of all occurrence reports in the only world spanning aviation language English would be necessary, a Serbian only release does not achieve this purpose as set by ICAO annex 13 and just forces many aviators to waste much more time and effort each in trying to understand the circumstances leading to the occurrence. Aviators operating internationally are required to read/speak English besides their local language, investigators need to be able to read/write/speak English to communicate with their counterparts all around the globe).
The report concludes the most probable causes of the serious incident were:
Immediate cause:
The damage was the direct result of thermal impact caused by the 10th stage bleed valve (HBV) remaining in the open position.
Indirect cause:
Failure of the solenoid valves.
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