Engine Oil System - MD Helicopters MD Explorer Servicing And Maintenance

Table 204. Airframe Periodic Inspection — Areas 3 and 4, Main Rotor and Upper Transmission
Registration No.
Model
900 Examine exterior of oil cooler blower, oil cooler, interconnect, and
cooling exhaust ducts:
D For damage, condition and security of attach hardware
D Inlet and outlet screens and interior of inlet and exhaust ducts for
foreign object damage (FOD).
900 Examine transmission lubrication system:
D Flexible hoses for leaks, damage, and security of connections
D Transmission overboard drain hoses for indication of too much
leakage, condition, and security of connections.
900 Examine main rotor static mast and support trusses:
D Condition and correct installation
D Visually inspect attach bolts for security
D Areas of mast tube that are in view for corrosion, the area between
the swashplate and main rotor head is very important.
If optional rotor brake system is installed:
900 Examine rotor brake:
D Head for leakage and security of installation
D Disc for wear and security of attach hardware
D Wear groove indicator for indication of too much lining wear
D Control valve for leakage and security of installation.
900 Examine forward left and right engine tubes for fluid leaks, condition,
and security of connections and supports.
900 Examine left and right forward engine firewall to plenum seals for
condition and security of fire seal clamp.
900 Examine left and right forward engine mounts for damage, condition,
indication of failure, and security of attach hardware.
If optional generator cooling modification is installed:
900 Do the "Generator Cooling Duct and Screen Inspection".
900 Examine left and right engine oil hoses and accessory pad drain
tubing for leaks, condition, and security of connections.
900 Examine collective, cyclic, and anti−torque flight controls brackets,
bellcranks, links and control rods located on the upper deck for
condition, indication of interference, correct installation, and control
rod bolts installed in correct direction.
MD Helicopters, Inc.
Rotorcraft Maintenance Manual
Deck (Cont.)
Serial No.
Requirement
Powerplant

Engine Oil System

Flight Controls
05-20-20
CSP−900RMM−2
Helicopter Total Hours
RMM Section
63−21−00
63−21−00
63−30−00
63−22−00
71−70−00
79−00−00
71−60−00
71−20−00
71−60−00
79−00−00
67−10−00
67−20−00
Initial
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Revision 34