MD Helicopters MD Explorer - Inspection; Test; Electrical System Functional Test; Hoist System Inspection; Rescue Hoist

CSP−900RMM−2MD Helicopters, Inc.
Rotorcraft Maintenance Manual
Page 601/(602 blank)
Revision 17
25-60-10
RESCUE HOIST
INSPECTION / TEST
1. Rescue Hoist
A. Hoist System Inspection
(1). Inspect attaching components for
security of installation.
(2). Inspect entire system for damage,
deformations, cracks and excessive
wear.
(3). Inspect cable and hoist assembly for
condition.
(4). Inspect electrical connections for
condition and security of installation.
(5). Replace any damaged or questionable
components.
B. Electrical System Functional Test
(1). Apply external power to helicopter (Ref.
CSP-900RMM-3, Section 96-00-00).
(2). On ELECTRICAL MASTER panel,
set POWER switch to BAT/EXT
position.
(3). On ELECTRICAL MASTER panel,
set R GEN switch to ON position.
(4). On electrical load center, verify HOIST
PWR and HOIST CUT circuit break
ers are closed.
(5). On instrument panel, set HOIST
switch to ON position.
(6). Verify hoist power on light is illumi
nated.
(7). On pendant, set load mode select to
250 LB.
Do not allow the payout of cable
to be retarded. If cable is pre
vented from paying out, cable will loosen on
drum and foul drum. Cable tension rollers
are use to provide positive constant tension
between cable and drum.
(8). On collective control module, hold
HOIST switch in DN position for a few
seconds.
(9). Verify cable is lowered and CABLE
PAYOUT display registers correct
reading.
A drag load of approximately 20
pounds must be applied to the
cable when hoisting to prevent cable from
becoming loose and fouling drum. Apply
drag load with gloved hand or use a clean
heavy cloth to protect hand and cable.
(10). On collective control module, hold
HOIST switch in UP position until
cable returns to original position.
Do not allow the payout of cable
to be retarded. If cable is pre
vented from paying out, cable will loosen on
drum and foul drum. Cable tension rollers
are use to provide positive constant tension
between cable and drum.
(11). On pendant, lower cable using payout
direction/speed control thumbwheel
switch.
(12). Verify cable is lowered and cable payout
display on pendant registers correct
reading.
A drag load of approximately 20
pounds must be applied to the
cable when hoisting to prevent cable from
becoming loose and fouling drum. Apply
drag load with gloved hand or use a clean
heavy cloth to protect hand and cable.
(13). On pendant, raise cable using payout
direction/speed control thumbwheel
switch to original position.
(14). On pendant, set load mode select to
600 LB.
(15). Repeat steps (8). thru (13).
(16). On instrument panel, set HOIST
switch to OFF position.
(17). On ELECTRICAL MASTER panel,
set
R GEN switch to OFF position.
(18). On ELECTRICAL MASTER panel,
set POWER switch to OFF position.
(19). Remove external power from helicopter
(Ref. CSP-900RMM-3, Section
96-00-00).
CAUTION
CAUTION
CAUTION
CAUTION