Serious incident Airbus A320-214 LZ-FBC,
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ASN Wikibase Occurrence # 267570
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Date:Saturday 22 May 2021
Type:Silhouette image of generic A320 model; specific model in this crash may look slightly different    
Airbus A320-214
Owner/operator:Bulgaria Air
Registration: LZ-FBC
MSN: 2540
Year of manufacture:2005
Engine model:CFMI CFM56-5B4/P
Fatalities:Fatalities: 0 / Occupants: 139
Aircraft damage: None
Category:Serious incident
Location:near Sofia -   Bulgaria
Phase: En route
Nature:Passenger - Scheduled
Departure airport:Sofia-Vrazhdebna Airport (SOF/LBSF)
Destination airport:Sharm el Sheikh
Investigating agency: AAIU Bulgaria
Confidence Rating: Accident investigation report completed and information captured
Bulgaria Air flight FB8509, an Airbus A320-214 aircraft, had just departed Sofia Airport, Bulgaria, when at
FL225 engine no.1 was shut down. The flight crew declared PAN PAN and returned to Sofia for a safe landing on runway 27.

Root cause:
- Violations in the technological process by Lufthansa Technik Sofia personnel during the replacement of the fuel pump of the left engine of the aircraft A320-214 with registration LZ-FBC;
Underlying cause:
- Absence of comprehensive flight control by crew of engine parameters during take-off and climb in terms of comparison of rotor speed, exhaust temperature and fuel consumption;
- Lack of awareness of the flight crew of the work performed during the servicing of the aircraft before the flight.



Accident investigation:
Investigating agency: AAIU Bulgaria
Report number: 
Status: Investigation completed
Duration: 1 year and 5 months
Download report: Final report

Revision history:

11-Sep-2021 12:50 ASN archive Added
31-Oct-2022 08:46 harro Updated [Aircraft type, Registration, Cn, Operator, Total occupants, Location, Phase, Nature, Departure airport, Destination airport, Source, Narrative, Accident report]

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