737 Flight Crew Operations Manual
Flight Instruments, Displays -
Head-Up Display System –
Controls
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-866-EGP 10.17.9
HGS Annunciator Panel
The HGS Annunciator Panel is installed in the First Officer’s instrument panel
and provides HGS status and warning annunciations to the First Officer during
CATIII approach, landing, and rollout operations.
In order to provide the high degree of safety necessary for manual CATIII low
visibility operations, the First Officer acts as an independent monitor and is
required to assess the approach to the runway and the performance of the HGS and
associated systems.
To test the HGS Annunciator Panel, set the master BRT/DIM/TEST switch to
TEST. When the BRT/DIM/TEST switch is in the TEST position, all legends on
the Annunciator Panel come on and stay on.
1 HGS Status Annunciations
• AIII (green) – AIII mode is active and all required systems and
equipment are valid. It is displayed concurrently with the AIII mode
annunciation on the Combiner
• NO AIII (amber) – loss of AIII capability above 500 feet AGL. "NO
AIII" shows concurrently on the Combiner
• APCH WARN (Approach Warning) (red) – system or approach
conditions out of tolerance
• FLARE (green) – system derived flare guidance is active. It is displayed
when the flare guidance symbol ("+") is displayed on the Combiner. If
AIII mode is lost, the “FLARE” annunciation will not illuminate
• RO ARM (Rollout Guidance Armed) (white) – system capable of
providing ground roll guidance during rollout. Displayed prior to
touchdown during an AIII approach
WARN
APCH
NO AIII RO CTN TO CTN
AIII RO TO
FLARE RO ARM
HGS
FAIL
__
TO
H
G
S
March 27, 2014
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