98 minutes elapsed before missing alert given
indonesia's Search And Rescue Services were briefed that the aircraft contacted Jakarta Center at 06:12L (23:12Z) while enroute at FL320 and requested to deviate left of airway M635 and to climb to FL380.
At 06:16L the aircraft was observed normally, radio contact occurred. At 06:17L radio contact was lost, the transponder (ADS-B) remained available-
however, at 06:18L the transponder was lost as well, the last recorded position was S3.3708 E109.6911 (about 110nm east southeast of Pulau Belitung). 50 minutes later INCERFA (aircraft position uncertain alert), 70 minutes later ALERTFA (emergency alert) and 98 minutes later DETRESFA (distress alert) was declared by ATC.
source avherald
50 mins to declare a/c not reporting and 98 minutes to declare missing when transponder went off 2 mins after radio contact was lost - why all so slow?