Esterline CMA-9000 - Holding Pattern Geometry; Sector 3 Approach - Direct Entry

OPERATOR’S MANUAL
CMA-9000 FLIGHT MANAGEMENT SYSTEM
C. SECTOR 3 APPROACH - DIRECT ENTRY
On reaching the holding fix, the crew will turn right to follow the holding pattern as a standard holding
pattern.
NOTE: The advisory message DIRECT HOLD ENTRY is displayed as soon as either of the following
conditions is fulfilled:
• five minutes prior to reaching the holding fix while the current aircraft track error is less than 5
degrees, otherwise
• ten seconds prior to the holding fix.
This advisory message may be retriggered at the holding fix if the entry procedure has changed from
the time the first advisory is generated and prior to reaching the holding fix.
The message is removed automatically as soon as the holding fix is overflown.
HOLDING PATTERN GEOMETRY
The initial geometry of the holding pattern is computed on the first fly-over of the holding fix, based on current
TAS and computed wind, and at a bank angle for a rate one (1) turn, or not exceeding the maximum configured
roll, whichever is less. The size of the holding pattern is compared to the dimensions of the protected airspace,
less a small buffer, defined by ICAO for the maximum holding speed (refer to Table10-1) and maximum wind for
that altitude. On each subsequent fly-over of the holding fix the holding pattern geometry is recomputed using
the current TAS and wind.
If the combination of actual holding speed and wind will cause the ICAO holding pattern protected airspace to be
exceeded, the alert message HIGH HOLDING SPEED (if configured) is generated one (1) minute prior to
reaching the holding fix on entry, and on each subsequent fly-over of the fix.
NOTE: When buffet protection is configured, the FMS removes the buffet limit during a hold to ensure that the
bank angle limit does not cause an increase in the holding pattern area.
Aircraft Type Altitude (feet) Maximum IAS (knots)
Fixed wing, fast 0-14,000
14,000-20,000
20,000-34,000
34,000 and above
230
240
265
0.83 Mach
Table 10-1 ICAO Maximum Holding Speeds
ICAO maximum bank angle is set to the minimum of 25 deg or the bank angle required maintaining a rate 1 turn at
the ICAO maximum true air speed.
ICAO maximum leg time is 1 minute for altitudes below 14 000 feet. It is set to 1.5 minutes otherwise.
ICAO maximum wind speed is set to twice the altitude value in thousands of feet plus 47.
ICAO maximum true air speed is computed based on, but not limited to, the ICAO maximum holding speed and as
a function of altitude.
Page 10-4
August 17, 2010
DRAFT