737 MAX Flight Crew Operations Manual
Flight Management, Navigation -
Flight Management System
Operation
11.31.10
MN-FLT-OH-201
1B402 - 1B786, 1B807 - 1J594
UNABLE REQD NAV PERF-RNP message will be displayed if there are
differences between IRU-L and IRU-R inertial sensors (altitude or vertical speed)
affecting vertical guidance control or vertical deviation cross track display while
the VNAV phase is in DES and the aircraft is on an RNP-AR approach leg.
1B785, 1B786, 1J585 - 1J594
Vertical Required Navigation Performance (VRNP)
The FMC uses 400 feet as a default Vertical Required Navigation Performance
(VRNP) value for oceanic, en route, and terminal phases of flight.
FINAL
350 FEET
RNP
2
°
TAPER
(DEFAULT 0.3 NM)
MINIMUM
(SAME AS NOMINAL LOCALIZER)
FAC FULL SCALE DEVIATION FOR IAN APPROACHES
APPROACH
COURSE
400 FEET
VRNP VALUE FOR OCEANIC, EN ROUTE,
AND TERMINAL PHASES OF FLIGHT
400 FEET
March 1, 2021