Piper SEMINOLE 2013 Pilot Operating Handbook page 242

SECTION 7
DESCR/OPERATION
7.11 LANDING GEAR (continued)
SAFETY SWITCH
If the gear selector is placed in the UP position when the airplane is on the
ground, a squat switch located on the left main gear will prevent the hydraulic
pump from actuating when the master switch is turned on. On takeoff, when
the landing gear oleo strut drops to its full extension, the safety switch closes,
allowing the hydraulic pump to raise the gear. Prior to initiating the preflight
check, be sure the landing gear selector is in the DOWN position and that the
three green gear indicators are displayed once the G1000 system is operating.
EMERGENCY EXTENSION
The landing gear is designed to extend even in the event of hydraulic
failure. The gear is held in the retracted position by hydraulic pressure. If the
hydraulic system lost pressure, gravity will extend the gear. To extend and
lock the gears in the event of hydraulic failure, it is necessary only to relieve
the hydraulic pressure. An emergency gear extension knob, located below and
to the left of the gear selector switch is provided for this purpose. A guard
across the knob prevents inadvertant movement. Moving the guard aside and
pulling the emergency gear extension knob releases the hydraulic pressure
holding the gear in the up position and allows the gear to fall free. Before
pulling the emergency gear extension knob, place the landing gear selector
switch in the DOWN position to prevent the pump from trying to raise the
gear.
If the emergency gear knob has been pulled
out due to a gear system malfunction, leave the
control in its extended position until the airplane
has been put on jacks and proper function of
the hydraulic and electrical systems have been
verified. See the Maintenance Manual for proper
landing gear system check out procedures.
REPORT: VB-2307
7-48
NOTE
PA-44-180, SEMINOLE
ISSUED: June 5, 2013