Altimeters tolerance
FCOM Supplementary techniques:
ALTITUDE TOLERANCES PFD 1 or 2 at ground check : plus or minus 25 ft (8 m)
MAXIMUM DIFFERENCES BETWEEN ALTITUDE INDICATIONS ALTITUDE (ft) COMPARISON BETWEEN FL/SPEED ADR 1 and ADR 2 (on PFD) GND CHECK 20 ft(6 m)
So how do you interpret this ?What is the altimeter tolerance on A320 at ground check? 20 ft or 25 ft?
The wording is different , with OR & AND. initially they say PFD 1 OR PFD 2 -->25 ft
Then ADR 1 AND ADR 2 on PFD ---> 20ft
Can anyone shed light on this?
Last edited by Citation2; 7th June 2012 at 12:05.