737 Flight Crew Operations Manual
Warning Systems -
Controls and Indicators
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15.10.2 D6-27370-866-EGP
Push – extinguishes both MASTER CAUTION lights
• system annunciator light(s) extinguish
• resets system for additional master caution conditions.
3 System Annunciator Panel
Illuminated (amber) – an amber light, relating to illuminated system annunciator,
has illuminated on forward overhead, aft overhead or overheat/fire protection
panel.
To extinguish – push either MASTER CAUTION light.
To recall – push and release either system annunciator panel
• if a master caution condition exists, appropriate system annunciator(s)
and MASTER CAUTION lights illuminate
• a single fault in certain redundant systems, or some simple faults, cause
the system annunciator light to illuminate during a recall. The system
annunciator light will extinguish when the MASTER CAUTION light is
pushed.
Proximity Switch Electronic Unit Light
1 Proximity Switch Electronic Unit (PSEU) Light
Illuminated (amber) –
• on the ground –
• a fault is detected in the PSEU.
• or, an overwing exit flight lock fails to disengage when commanded.
• in-flight –
• inhibited from thrust lever advance for takeoff until 30 seconds after
landing.
September 24, 2015
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