AUTOFLIGHT, CAT II
Operation
Aircraft Operations Manual
3.2
O
PAGE
20
Apr 01/15
CONDITIONS
ABNORMAL PROCEDURES
3.7
ELECTRICAL
POWER
INTERRUPTION
WHEN FLYING
LOC/GS
When flying in APPR and LOC and/or GS capture or in NAV mode and LOC
capture. Loss of electrical power to the NAV receiver will cause the following on
the EADI:
LOSS OF 28 VDC:
−
The FD/AP will revert to basic modes (HDG/VS) changing captured LOC/GS
annunciation to captured HDG/VS annunciation.
−
LOC and/or GS indication disappears.
−
The FD/AP will maintain HDG and VS mode until other modes are selected.
With Mod. No. 1790 installed, loss of 28 VDC below 1000 ft RALT will addition-
ally cause the following:
LOSS OF 28 VDC BELOW 1000 RALT:
−
Loss of 28 VDC to one NAV receive will give LOC and/or GS comparator cau-
tion opposite side.
−
AP and YD will disconnect and warning comes on.
LOSS OF 26 VAC INVERTER:
−
No effect on LOC/GS.
ACTIONS
−
Perform GO AROUND.
