Overview
• Operator: Lufthansa
• Aircraft Model: Airbus A319-100
• Registration: D-AILA
• Flight Number: LH-2507
• Route: Manchester, EN (UK) to Munich, Germany
• Date: 29 January 2025
• Occupants: 107 passengers and crew
Incident Summary
Lufthansa flight LH-2507, an Airbus A319-100, was enroute from Manchester (UK) to Munich (Germany) at FL350 when the crew experienced engine trouble while overflying London Heathrow airspace. The aircraft diverted to London Heathrow, turning off the airway and commencing a descent.
The aircraft landed safely on Runway 27R at London Heathrow Airport (LHR) approximately 30 minutes after the diversion was initiated.
Sequence of Events
1. Cruise Phase:
• The aircraft was at FL350 when the crew received engine-related warnings.
• “THR LVR DISAGREE ENG1” and “TLA FAULT” messages were displayed in the cockpit.
2. Diversion Decision:
• The crew declared PAN PAN due to the thrust lever disagreement and throttle lever angle (TLA) fault.
• The aircraft turned off the airway and initiated a descent towards London Heathrow.
3. Descent and Landing:
• During the descent, the fault messages disappeared when the engine was at idle power.
• The aircraft performed a safe landing on Heathrow’s Runway 27R.
4. Post-Landing Status:
• The aircraft remained on the ground at London Heathrow for over 36 hours following the incident.
Airline Statement
Lufthansa confirmed that engine trouble with the left-hand CFM56 engine prompted the diversion. The airline has not specified the cause of the engine issue but stated that the aircraft diverted as a precautionary measure.
Investigation and Technical Analysis
• Cockpit Alerts:
• The “THR LVR DISAGREE ENG1” message indicates a mismatch between the thrust lever position and actual engine power output.
• “TLA FAULT” suggests a throttle lever angle discrepancy, possibly linked to an issue with the engine’s electronic control system (FADEC) or throttle position sensors.
• These warnings are typically associated with engine response inconsistencies, a throttle quadrant malfunction, or potential sensor faults.
• Possible Causes:
• Electronic Thrust Control Malfunction: An issue with the FADEC system may have caused the thrust lever disagreement.
• Throttle Lever or Sensor Fault: A faulty throttle position sensor could have resulted in incorrect engine response data.
• Transient Fault: The fact that the warnings cleared during descent suggests a potential electrical or transient anomaly.
• Next Steps:
• Lufthansa engineers are conducting a full engine and flight control system inspection before the aircraft is cleared to return to service.
• The Airbus A319’s flight data and maintenance logs will be reviewed for anomalies.
Aircraft Status
• The A319 remains grounded at London Heathrow for maintenance evaluation.
• Lufthansa is expected to provide a further update once the aircraft undergoes diagnostics and engine system checks.
Analysis and Safety Considerations
• Thrust lever disagreements can result in inconsistent engine performance and require immediate crew intervention.
• The decision to divert was in line with standard precautionary safety protocols to ensure passenger and aircraft safety.
• Engine electronic control malfunctions are uncommon but require thorough troubleshooting to rule out potential sensor faults, FADEC failures, or mechanical control issues.
Lufthansa and Airbus will monitor similar incidents to determine if this event is an isolated occurrence or part of a broader trend affecting A319 aircraft with CFM56 engines.
Disclaimer
This report is based on publicly available information as of 30 January 2025. While every effort has been made to ensure accuracy, the completeness of the details cannot be guaranteed. If you are the rightful owner of any referenced materials and wish them removed, please email takedown@cockpitking.com.
