Terminal 3 transfer by Big airlines are brought by Terminal 1 renovations, meaning they were forced to relocate because the gate and the holding area to where they are assigned are being worked on. Gates at Terminal 1 are premium and no crazy airline operating in Manila would want to surrender the slots, particularly those which had been operating in the country for quite a long time. Crazy as it seems because we think T3 is better but its not airline wise. T1 and T2 is very much better particularly if you use 06/24 all the time. You should figure it out why it is so.
By the way, T3 is already owned by the government, not the losing cargo provider. Also, charges for ground services are based on aircraft weight, so naturally charges for a widebody jet is 3-4 times bigger than the narrowbody ones.
whats the guideline / rule of CAAP for minimum distance between centerlines for simultaneous operations of parallel runways?
If I'm not mistaken, FAA has a 4000+feet rule between centerlines (please correct me if I'm wrong)...
It depends. There is separate figures for instrument and non-instrument approaches and departures.
For Manila, its going to be Non instrument, meaning landing and departure will be visual at a certain altitude.
As to separation distance, parallel runway needs to be 210 meters apart while taxiway needs to be separated by 93 meters, and the new parallel runway needs to have a further shoulder length of 75 meters, which when computed would total about 378 meters from runway 1 centerline.
While we talk about it, here is the actual separations made by CAAP.
image courtesy of GMAnetwork