2A-31-100: Maximum Vertical Acceleration Reporting
Airplanes equipped with Honeywell’s Primus EpicT PlaneView system have a Maximum
Vertical Acceleration reporting system incorporated to record and display the maximum
vertical acceleration (or “Peak Nz”, commonly referred to as “G”) experienced by the
airplane during landing. Data recorded by this system is accessed through selection of
the END OF FLIGHT REPORT page on the Central Maintenance Computer (CMC), and
is displayed as MAX VERTICAL ACCEL. The reading display can be used in determining
if either a hard landing inspection or overweight landing inspection is required.
Referring to Figure 23 on the next page, the established maximum vertical acceleration
limit which determines whether a hard landing inspection is required increases with
airplane gross weight from 2.0 “G” to 2.15 “G” at the G550 maximum landing weight of
75,300 lb. Conversely, the established maximum acceleration limit which determines
whether an overweight landing inspection is required decreases with airplane gross
weight from 2.15 “G” at the maximum landing weight of 75,300 lb (1.60 “G” at the
maximum takeoff weight of 90,000 lb).
In addition to depending on actual airplane weight, the maximum vertical acceleration
limit assumes that no extremely high side loads were experienced during landing. If the
maximum vertical acceleration recorded during landing is within limits and no extremely
high side loads were experienced, no inspection is required. If extremely high side loads
were experienced during landing, or if the maximum vertical acceleration limit was
exceeded, the flight crew shall log the occurrence for maintenance action.
For additional information, refer to G550 Maintenance Manual Chapter 31.
OPERATING MANUAL
PRODUCTION AIRCRAFT SYSTEMS
2A-31-00
Page 61
July 15/04
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