https://flightaware.com/live/flight/.../WSSS/tracklog
UTC
1845 TOC FL300
1921 last record at FL300 was heading NW, the next time stamp is over 2hrs later...
2127 FL170 heading SW
2226 FL170, then commenced descent for landing
The drop in altitude seems related to the turnaround and return to Singapore, why would they then stay at FL170 for an hour before making a final descent for landing? to burn off fuel? did they dump fuel? or just ATC directions? any other idea's?