Originally Posted by
El Bunto
Just from observation, EXS03_A and EXS04_A are positioning codes. They don't seem to correlate with the origin airport so perhaps they indicate something about the flight. Swap versus recovery, perhaps? I'll have to keep an eye open.
EXS05__ are test flights, as noted above.
The flight numbers and suffix's are chosen so that the bean counters at Jet2 HQ can determine where the costs are going to.
I believe it goes something like this with suffix's in brackets:
LS031-039 Engineering positioners (E) - Planned Engineering, (R) - recovery for over-running mx etc
LS041-049 On the day recovery positioners (A)
LS051-059 (B) - Serviceability Flights, (H/K) - Positioning for C Check, post C Check flights
LS061-069 Charter positioners (C)
LS071-079 Weather diversion positioners (W)