CSP−900RMM−2MD Helicopters, Inc.
Rotorcraft Maintenance Manual
Page 101
Revision 34
25-55-00
CARGO HOOK SYSTEM
FAULT ISOLATION
1. Cargo Hook System Troubleshooting
(Ref. Table 101)
The troubleshooting procedures of Table 101
are a brief summary of cargo hook system
faults, which possibly can occur. Use Table 101
with simplified system schematics, electrical
wiring diagrams, serviceability checks, and
other detailed procedures referred to in this
and other chapters of the manual.
The wiring diagrams are in the Rotorcraft
Maintenance Manual (ref. CSP-900RMM-3,
Section 98-40-00).
Table 101. Cargo Hook System Troubleshooting
Fault Probable Cause Corrective Action Ref. Section
Cargo hook release operates
manually (by manual release
lever) but fails to operate
electrically (by release
switch).
Defective hook release
switch.
Replace switch. 25−55−00
Faulty ground. Attach ground wire. 98−00−00
Faulty cargo hook circuit
breaker.
Replace circuit breaker. 96−00−00
Faulty wiring. Repair or replace wiring. 98−00−00
Cargo hook operates
electrically (by release
switch) but fails to operate
mechanically (by manual
release lever).
Manual release cable
adjusted incorrectly.
Adjust cable. 25−55−00
Broken or disconnected
cable.
Replace or attach cable. 25−55−00
Defective hook assembly. Replace hook assembly. 25−55−00
SENSFALT=15 Rotorcraft is not configured
for cargo hook and shorting
plug is not installed or is
wrong resistance.
Make sure shorting plug
resistance is 346 to 354 ohms
and correctly installed (ref.
Cargo Hook Excitation Test).
95−30−00
Sensor excitation failure. Do the Sensor Excitation Test.
Replace a faulty sensor.
95−30−00
IIDS defective. Do the Sensor Excitation Test.
Replace a defective IIDS.
95−30−00
Faulty wiring. Do the Sensor Excitation Test.
Repair or replace faulty wiring.
95−30−00
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