Section 7 IFR Procedures
7-32
IDU-450 EFIS Software Version 8.0H (Rotorcraft)
1
st
Ed Nov 2018
As depicted in Figure 7-14, during this VTF VFR approach, the aircraft
proceeds towards the IP. Since the IP is designated as a discontinuity,
proceeding direct is not possible. When attempting to proceed direct to the
IP, only the active leg between the IP and RW06 is activated.
7.13. Loss of Navigation Monitoring
The EFIS continuously monitors for loss of navigation capability. In manual
or automatic RNP mode prior to sequencing the FAWP, the loss of
navigation caution is displayed using a 10-second TTA if the RNP value is
less than 2 NM and a 30-second TTA otherwise. Use the Faults menu to
distinguish the cause of the LON caution. The caution returns to its normal
state upon termination of the responsible condition.
7.13.1. Automatic RNP Mode
In automatic RNP mode, after
sequencing the FAWP, the EFIS
indicates when the navigation system is
no longer adequate to conduct or continue the approach by displaying the
LON condition inside the CDI on the transmit enabled display. The flag is
latched until no longer in an approach mode.
Figure 7-15: LON Indication
NOTE:
The aircraft is equipped for the following individual levels of RNP but may
not be capable due to limited satellite coverage. Manual RNP is
selectable between 0.10NM and 15NM as follows:
1) 0.01 NM increments between RNP 0.10 and RNP 0.3
2) 0.1 NM increments between RNP 0.3 and RNP 2
3) 1 NM increments between RNP 2 and RNP 15
7.13.2. Faults Menu
Use the faults menu to distinguish the cause of the LON caution. Table
7-10 explains conditions and caution termination for each mode of flight.
Table 7-10: Summary of Faults Menu
Mode of Flight
Conditions
Caution Termination
Manual RNP
LON displayed with a
10-second time to
alert if RNP value is
Returns to normal
state immediately