Looks like it diverted to SFO and had a scheduled stop in ANC, but that was cancelled. Two weeks ago I was on 890 (NRT-LAX) and we had engine problems and a stop was scheduled for HNL but that was cancelled and we went to LAX as scheduled, 5 hours late. Seems like a similar situation.
PHL ORD 07:45 09:08 09:02 10:14 OPERATIONS
ORD SFO 747 12:15 13:18 18:10 DVRT OPERATIONS
SFO ANC 747 19:30 DVRT NSTP OPERATIONS
ANC HKG 747 NSTP 18:05 01:50 OPERATIONS
HKG SIN 747 20:10 On Time 23:55 23:45 OPERATIONS
Actual time in orange
Estimated time in blue
NSTP = No Stop
DVRT = Divert