Overview
• Operator: Sky Angkor Airlines
• Aircraft Model: Airbus A321-200
• Registration: XU-723
• Flight Number: ZA-672
• Route: Phnom Penh (Cambodia) → Bangkok (Thailand)
• Date: 25 January 2025
• Occupants: Not specified
• Nature of Incident: Wrong runway landing
Incident Summary
Sky Angkor Airlines flight ZA-672, an Airbus A321-200 (XU-723), was on final approach to Bangkok Suvarnabhumi Airport (BKK) when it was cleared to land on runway 20R. However, during short final, the aircraft deviated from its assigned path and landed on runway 20L instead.
The Thai Aircraft Accident Investigation Bureau (AIB) classified the event as a serious incident and launched an investigation. ATC reports indicate that the aircraft was properly aligned with runway 20R before unexpectedly transitioning to 20L.
Despite the deviation, no operational disruptions were reported, and the aircraft continued its scheduled operations after landing.
Sequence of Events
1. Final Approach:
• The aircraft was cleared for an approach to runway 20R at Bangkok Suvarnabhumi Airport.
• ATC monitored the aircraft’s approach and observed an initial correct alignment with the assigned runway.
2. Runway Deviation:
• As the aircraft neared the threshold, it unexpectedly shifted course toward runway 20L.
• The aircraft subsequently landed on 20L instead of the assigned 20R.
3. Post-Landing Actions:
• ATC did not report any immediate conflicts with other aircraft on the parallel runway.
• The aircraft taxied to its gate and continued its scheduled operations without further incident.
4. Investigation Initiated:
• The Thailand AIB classified the event as a serious incident and opened an investigation.
• The investigation will focus on pilot situational awareness, possible navigation misinterpretations, and ATC communications.
Potential Causes & Analysis
1. Visual Confusion Between Parallel Runways
• Suvarnabhumi Airport features two closely spaced parallel runways (20L and 20R).
• Pilots may have experienced runway confusion, leading to an unintended alignment with the adjacent runway.
• Factors such as low visibility, lighting conditions, or cockpit workload may have contributed.
2. Autopilot or Navigation Error
• The aircraft’s navigation system may have provided incorrect or conflicting information.
• A potential ILS misinterpretation or incorrect FMS input could have guided the aircraft toward the incorrect runway.
3. ATC & Crew Communications
• The crew may have misheard or misinterpreted the ATC clearance for runway 20R.
• A last-minute heading adjustment without proper verification could have caused the deviation.
Safety Recommendations & Preventative Measures
• Enhanced Pilot Training on Parallel Runway Operations
• Pilots should undergo additional training to differentiate closely spaced runways in high-traffic airports.
• ATC Reinforcement of Clearance Instructions
• Controllers should reconfirm clearances when aircraft are approaching multiple parallel runways.
• Implement proactive monitoring and early intervention procedures.
• Review of Airport Approach Procedures
• Consideration for distinctive approach lighting or visual cues to improve differentiation between parallel runways.
• Investigation Outcome Awaited
• The Thailand AIB is expected to release findings on the causes and contributing factors of the incident.
Disclaimer
This report is based on available information as of 14 February 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.
