MD Helicopters MD Explorer - Page 900

CSP−900RMM−2 MD Helicopters, Inc.
Rotorcraft Maintenance Manual
Page 102
Revision 35
29-00-00
Table 101. Hydraulic System Troubleshooting (Cont.)
Fault Ref. SectionCorrective ActionProbable Cause
HYD 2 not present on IIDS
during System 2 self test.
Open ground between
GS107−B and P425−B.
Test and repair wiring. 98−00−00
Faulty test solenoid. Replace solenoid.
28 Vdc not present at
K1−7/8−B2.
Test and repair wiring. 98−00−00
CB 48 inoperative. Replace circuit breaker. 96−30−00
Faulty switch S5 A606 Utility
Control Panel.
Replace switch. 96−30−00
HYD 2 present on IIDS
during System 1 self test, but
no pressure reading below
250 psi present on alpha
numeric IIDS display. (With
no IIDS SENSEFALT BIT 15
= 7.5V EXCITATION failure.)
Faulty pressure transducer
on A401 Manifold 1.
Replace transducer. 29−00−00
Faulty wiring between A401
Hydraulic Manifold 2 P423
and A2 IIDS P103.
Test and repair wiring. 98−00−00
HYD 2 present on IIDS and
low pressure reading present
on alpha numeric display.
Faulty pump. Internally
worn.
Test pump output pressure with
mechanical gauge and repair or
replace pump as necessary.
29−00−00
Loose / broken fitting or
cracked/broken line.
Repair / replace fitting / line. 29−00−00
Leaking actuator. Repair / replace actuator. 67−10−00
Hydraulic System 1 or 2 filter
impending bypass delta
pressure (Delta P) indicator
will not reset.
(NOTE: Remove the filter
bowl before the button is
reset.)
Filter is dirty. Replace hydraulic filter and
reset bypass (Delta P)
indicator.
29−00−00
Bypass (Delta P) indicator
dirty.
Remove and clean bypass
(Delta P) indicator.
29−00−00
Faulty bypass (Delta P)
indicator.
Remove and replace bypass
(Delta P) indicator.
29−00−00