Some further evidences that there is a time zone conversation issue when flights get scheduled from routes. This relates to the treatment of +1 and +2 during flight scheduling.
Currently I have an aircraft with "in flight" status, "enroute to EWR". It also has a big red "ERROR" for location.
NXX041 Airbus A340-500 Leased 2 70 64 56 20 42,718 16,426 ERROR 100.0% 9.13
On active flights screen, it is currently flying two flights at the same time.
LL 232 MEL — Melbourne EWR — Newark 13:53 (01:53 — 15 Hours 30 Minutes) A340-500 (NXX041)
LL 231 EWR — Newark MEL — Melbourne 07:03 (05:03 — 18 Hours 40 Minutes) A340-500 (NXX041)
Note that this should be the first round trip that this (perhaps the world's longest) route has been scheduled and flown, because it was just set up yesterday and the plane just got transferred into place at EWR in time for the above outbound leg LL 231. That means these two legs are of the same route, same flight, scheduled at the same time, not remainder of a previous flight that somehow got overlapped.
Route schedule wise, outbound depart Wed, Fri, Sun from EWR at 21:20 local time, arriving at MEL 07:03+2, local time.
Inbound leg should then depart Fri, Sun, Tue from MEL at 08:10 local time, arriving at EWR same day at 13:53, local time.
What happened was that the system basically scheduled the outbound of 17/6 and the inbound of 17/6 at the same time. The correct inbound should be scheduled on 19/6 instead, local time.
Similarly, this might be the issue that contributes to the partially scheduled flight, as in the system treat the leg that get left out as something that is already in the past. Say if a flight is generated at 08:00, with a leg that should depart 02:00+1 local time. If the system treats it as 02:00+0, then the leg would simply not get scheduled because it was in the past already. Hence, some routes (always the same one?) get scheduled partially. This might also be related to the international day line conversion, which would explain why the North American test airlines have the issues, but not the European test airlines.
(Come to think of it, this should not be the issue affecting the partially scheduled flights. The system deals with +1 without too much of an issues. Guess it is the +2 that broke the codes...)
Edit 2:
The previously reported "skipping a day" issue with flight schedule might not be due to system lags after all. I am seeing the followings.
Deactivating route, cancelling flights, reactivating the route, yielded the exact same results. I went as far as re-doing the operating days of the route, but still to no avail. Guess we will lump this onto the date issue when flights get generated.
EWR IST EWR M T W Th F S Su 23:10 — 22:34 747-200 (NXX020)
LL 213 EWR — Newark IST — Istanbul 06-18 23:10 (06-19 11:10 — 24 Hours 11 Minutes) 747-200 (NXX020)
LL 214 IST — Istanbul EWR — Newark 06-19 18:50 (06-19 23:50 — 36 Hours 51 Minutes) 747-200 (NXX020)
IND MXP IND M T W Th F S Su 23:50 — 23:00 A330-300 (NXX018)
LL 121 IND — Indianapolis MXP — Milan 06-18 23:50 (06-19 11:50 — 24 Hours 41 Minutes) A330-300 (NXX018)
LL 122 MXP — Milan IND — Indianapolis 06-19 19:00 (06-20 01:00 — 37 Hours 51 Minutes) A330-300 (NXX018)
Hope this helps.
Currently I have an aircraft with "in flight" status, "enroute to EWR". It also has a big red "ERROR" for location.
NXX041 Airbus A340-500 Leased 2 70 64 56 20 42,718 16,426 ERROR 100.0% 9.13
On active flights screen, it is currently flying two flights at the same time.
LL 232 MEL — Melbourne EWR — Newark 13:53 (01:53 — 15 Hours 30 Minutes) A340-500 (NXX041)
LL 231 EWR — Newark MEL — Melbourne 07:03 (05:03 — 18 Hours 40 Minutes) A340-500 (NXX041)
Note that this should be the first round trip that this (perhaps the world's longest) route has been scheduled and flown, because it was just set up yesterday and the plane just got transferred into place at EWR in time for the above outbound leg LL 231. That means these two legs are of the same route, same flight, scheduled at the same time, not remainder of a previous flight that somehow got overlapped.
Route schedule wise, outbound depart Wed, Fri, Sun from EWR at 21:20 local time, arriving at MEL 07:03+2, local time.
Inbound leg should then depart Fri, Sun, Tue from MEL at 08:10 local time, arriving at EWR same day at 13:53, local time.
What happened was that the system basically scheduled the outbound of 17/6 and the inbound of 17/6 at the same time. The correct inbound should be scheduled on 19/6 instead, local time.
Similarly, this might be the issue that contributes to the partially scheduled flight, as in the system treat the leg that get left out as something that is already in the past. Say if a flight is generated at 08:00, with a leg that should depart 02:00+1 local time. If the system treats it as 02:00+0, then the leg would simply not get scheduled because it was in the past already. Hence, some routes (always the same one?) get scheduled partially. This might also be related to the international day line conversion, which would explain why the North American test airlines have the issues, but not the European test airlines.
(Come to think of it, this should not be the issue affecting the partially scheduled flights. The system deals with +1 without too much of an issues. Guess it is the +2 that broke the codes...)
Edit 2:
The previously reported "skipping a day" issue with flight schedule might not be due to system lags after all. I am seeing the followings.
Deactivating route, cancelling flights, reactivating the route, yielded the exact same results. I went as far as re-doing the operating days of the route, but still to no avail. Guess we will lump this onto the date issue when flights get generated.
EWR IST EWR M T W Th F S Su 23:10 — 22:34 747-200 (NXX020)
LL 213 EWR — Newark IST — Istanbul 06-18 23:10 (06-19 11:10 — 24 Hours 11 Minutes) 747-200 (NXX020)
LL 214 IST — Istanbul EWR — Newark 06-19 18:50 (06-19 23:50 — 36 Hours 51 Minutes) 747-200 (NXX020)
IND MXP IND M T W Th F S Su 23:50 — 23:00 A330-300 (NXX018)
LL 121 IND — Indianapolis MXP — Milan 06-18 23:50 (06-19 11:50 — 24 Hours 41 Minutes) A330-300 (NXX018)
LL 122 MXP — Milan IND — Indianapolis 06-19 19:00 (06-20 01:00 — 37 Hours 51 Minutes) A330-300 (NXX018)
Hope this helps.