Airbus (320) RA discrepancy

[Jetset320]

Especially in light of the recent red OEB, I cannot seem to find a reference to the maximum allowed RA discrepancy on the ground. Sometimes there are a few feet difference between RAs. Surely some limitation must exist?

[Graybeard]

If there is not a consistent difference from one plane to the next, or one flight to the next, I would question a mechanic. They have to be consistent.

GB

[scorpilot]

supp procs fcom 3 check altitude tolerances under Nav chapter...might get some help there...cheers

[Jetset320]

scornpilot; actually Fcom 3 (3.03.34) refers to altimeters but not Radio Altimeters.

Graybeard; that leaves a grey-area....... not very typical of airbus!