Saab 340B, Operation Manual, Page: 212 / 670

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AUTOFLIGHT, CAT II
Operation
Aircraft Operations Manual
3.2
O
PAGE 14
CONDITIONS NORMAL PROCEDURES
(Cont’d)
If the course pointer is set to a wrong inbound course prior established or if the
pointer is moved away from a correct inbound course after established on the
localizer, the aircraft can or will deviate from the localizer.
SET CORRECT INBOUND COURSE.
WARNING
The lateral operation of this mode is essentially the same as in NAV LOC
mode except for higher FD/AP control law gains to give increased precision
during approach.
1. NAV frequency selector SET ILS . . . . . . . . . . . . . . . . . . . . . . . . . .
FREQUENCY
− The ILS frequency should be selected on both NAV
controls.
2. CRS selector SET ILS INBOUND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COURSE
− Check course readout on EHSI.
3. HDG knob SET LOC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INTERCEPT HDG
4. DCP SET HDG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
*5. Radio altimeter CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
− Radio altimeter test must be performed before APPR mode is selected. Tem-
porary config warning will occur if RA test performed with PL below 64

. In
APPR and NAV mode the test function is disabled.
6. MSP APPR button PRESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
− Do not selected APPR mode until localizer deviation indication becomes act-
ive and correct localizer beam confirmed.
− When APPR mode is selected before capture conditions are met, system
automatically goes into HDG mode whilst APPR is armed.
7. HDG green, LOC white on EADI CHECK . . . . . . . . . . . . . . . . . .
8. At LOC ”CAP”, LOC green and GS white on EADI CHECK . .
9. At GS ”CAP”, GS green on EADI CHECK . . . . . . . . . . . . . . . . .
− Radio height is used to gain program localizer and glideslope signals.
− Establish aircraft in landing configuration before 600 ft above threshold.
− If excess deviation alert occurs below CAT I minima perform go − around.
10. HDG knob SET GA HDG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(Cont’d)
Jun 01/20