#2 GPS/NAV Failure
If a failure occurs in the #2 GPS/NAV system (GIA), the other GPS/NAV
system will automatically provide GPS information to both displays. Check
the GPS/NAV circuit breakers to ensure they are both in. If one is open, try
resetting it (push in). If it pops back out, DO NOT reset it.
#2 NAV and #2 COM frequency information will not be displayed on any of
the ight displays. If COM #2 is used, all transmissions will be broadcast on
121.5 MHz. 121.5 MHz is automatically selected when a failure occurs in the
system. COM #1 and NAV #1 may be used as normal.
The following annunciations will be shown on the PFD:
BOTH ON GPS 1 – Both PFD units are receiving GPS data from the No. 1 GIA unit.
AHRS 1 GPS – AHRS 1 not receiving backup GPS information.
TRAFFIC FAIL – Trafc device has failed.
Figure 3A-6 – No. 2 GPS/NAV Computer Failure (No. 1 PFD Shown)
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