Searey LSA – Pilot’s Operating Handbook Version 5.0, Revision 8
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26. Landing Gear Switch
27. Left Landing Gear Circuit Breaker (Push-Pull)
28. Right Landing Gear Circuit Breaker (Push-Pull)
29. Storage Box
30. Alternator Circuit Breaker
31. ELT Panel Control Unit
32. USB power outlet
33. 12 V. Aux. Outlet
7.4.1 ELECTRICAL SYSTEM
The Searey operates on a 12-volt DC electrical system.
7.4.1.1 Battery
A 12-volt, 17 amp Hr sealed lead acid battery is used for the aircraft power
supply. The battery is located in the forward fuselage in front of the rudder
pedals.
7.4.1.2 Master Switch
The Master Switch is a split-rocker type switch labeled MASTER and is
ON in the UP position and OFF in the DOWN position. The right half of
the switch controls power from the battery. The left half controls the
power from the alternator.
Normally both sides of the master switch should be used simultaneously,
however the Battery side of the switch may be turned on separately to
check or operate equipment while on the ground. The generator side of
the switch, when placed in the OFF position, isolates the generator from
the electrical system. With the switch in this position the entire electrical
load is placed on the battery. Continued operation with the generator
switch OFF will reduce battery power and cause electrical system failure.
7.4.1.3 Turning On Power – Proper & Fault Conditions
Electric power is initially brought up by turning on the Battery (right) side
of the red Master Switch. The Master Relay is activated and applies
battery voltage to the power distribution circuitry. The Master On lamp
and the mechanical airspeed indicator ring lamp should illuminate.
Fault? If the lamp does not illuminate the problem could be (a) dead
battery, (b) a tripped 2 a. Master Relay circuit breaker or (c) a faulty lamp,
wire or relay.
a. With battery power on, power is fed through the 30 a. Battery Breaker to
the power bus feeding the bank of circuit breakers on panel 4. All
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