So I fly a Boeing product long haul.
Cold soaked APU.
Some use the following technique: after landing check turn APU switch to ON but not start till just prior to parking.
ON position opens the APU door and allows the cold soaked APU to come up to ambient temperatures.
Thats their explanation anyway, seems reasonable.
Was corrected yesterday by a Captain who calls that an incorrect technique and not what Boeing recommends. Advocates an immediate start after landing.
Any guidance from the maintenance Gods?
Any difference between Honeywell or P&W APU’s?
Mechanical sympathy would dictate some ‘warming’ time prior to start.
Ideas? Opinions?