Originally Posted by
proxus
Just curious. Does anyone have a reference to the EU regulatory change for this? Would be glad to forward this to my company.
Proxus
Yes, I do:
Regulation (EU) 965/2012 on air operations
Annex V – Part-SPA
SPA.RVSM
AMC2 SPA.RVSM.105 RVSM operational approval
(d)(1)(vii)
At intervals of approximately 1 hour, cross-checks between the primary altimeters should be made. A minimum of two will need to agree within ±60 m (±200 ft). Failure to meet this condition will require that the altimetry system be reported as defective and ATC notified.
The usual scan of flight deck instruments should suffice for altimeter cross-checking on most flights.
The marked part appears to be rather new... So, no need anymore to record every hour.