5-45 100-Hour / Annual Maintenance and Inspection [10 of 25 Pages]
MAIN ROTOR GEARBOX COMPARTMENT (continued)
Fuel Tank Sump Drain:
Inspect condition. Verify drain valve opens easily, drains fuel freely, springs closed,
and seals completely. Inspect drain tube and clamp for defects, tears, or material
deterioration. Clear fuel from drain tube and install clamp.
Fuel Valve:
Inspect condition. Verify cable and component security. Verify proper installation and
(smooth) operation of valve.
Cabin Bulkhead:
Inspect condition. Verify no deformation, buckling, wrinkling, nicks, scratches, dents,
cracks, corrosion, fretting, or loose rivets. Verify no leakage from fuel tanks. Verify
security.
Main Rotor Gearbox:
Inspect condition. Verify no damage, material deterioration, or deformation of gearbox
mounts. Verify no leakage at mast tube-to-gearbox attachment. Inspect mast tube for
cracks. With ship on level ground, verify correct oil level and cleanliness through sight
gage and adjust or flush as required. Verify security of Hall Effect senders and yoke
magnets. Inspect oil lines for leakage, chafing, or obvious damage. Inspect oil pump
mounting and fittings for leaking or obvious damage. Inspect gearbox oil filter for leakage
or for tripped bypass indicator. Verify oil system proper installation and security.
NOTE
At 600 hours time in service or annually, whichever occurs
first, remove chip detector and clean off varnish build-up from
detector’s magnetic probe and adjacent metal body (a toothbrush
dampened with solvent works well). Service gearboxes, change
oil and filter, and clean chip detectors at intervals recommended
in Section 5-20.
Rotor Brake:
Inspect condition. Verify integrity of brake pads and 0.030 inch minimum pad thickness.
Verify brake pads are clear of engine shaft with brake released. Inspect micro switches
for cracks. Verify no loose, chafed, or broken wires or terminals. Verify security.
Inspect both pulleys (one at end of lever, one next to fuel tank) for cracks. Verify no
frayed strands or binding of rotor brake activating cable. Verify proper routing and
installation, security, and operation of brake and brake micro switch.
Hydraulic Servo Support Frame:
Inspect condition. Inspect rod ends per Section 5-33. Use an inspection light and
mirror to inspect all parts of each weld. Verify no cracks or corrosion in servo support.
Verify proper installation and security.
Jackshaft:
Inspect condition. Verify no cracks or corrosion in welded assembly. Inspect jackshaft
to vertical push-pull tube attachment. Inspect jackshaft aft support frame attachment and
forward attachment rod end per Section 5-33. Inspect C343-8 tube and rod ends linking
jackshaft to aft servo. Verify security and proper operating clearance.
Page 5.22 Chapter 5 Inspection Schedule R66 Maintenance Manual SEP 2012
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