C 3, SB 740-97-38
Classification
Item
Defect
Major
Minor
A
B
MANIFOLD LUBRICATOR:
Interior surfaces
Stage III corrosion ....................................................................................
x
Stage II corrosion; O-ring deteriorated .............................................................................................................
x
Needle valve
Handwheel broken; stem bent or frozen................................................
x
MAIN AIR VALVE:
Stage III corrosion on interior surfaces; O-ring
and/or plug deteriorated
x
Stage II corrosion on interior surfaces; handle bent,
broken or distorted
............................................................................................................. x
HYDRAULIC BOOM:
Boom
Bent, broken or distorted ........................................................................
x
Hydraulic tank
Stage III corrosion on internal surfaces.................................................
x
contaminated
............................................................................................................. x
Hydraulic tank oil
filters
Stage II corrosion on internal surfaces; leaking filter;
contaminated with foreign matter
x
Piston rods
Stage III corrosion ....................................................................................
x
Stage II corrosion
............................................................................................................. x
Seals
Deteriorated or leaking ............................................................................
x
Boom turret
Bent, broken or distorted; locking pin frozen
or missing
............................................................................................................. x
HYDRAULIC BOOM CONTROL
VALVES:
Interior surfaces
Stage III corrosion ....................................................................................
x
Stage II corrosion
............................................................................................................. x
Plungers (spool)
Stage III corrosion ....................................................................................
x
Stage II corrosion
............................................................................................................. x
Seals
Deteriorated or leaking ............................................................................
x
and cables
Bent, broken or distorted; stage III corrosion on ex-.
posed portion of cables
x
Stage II corrosion on exposed portion of cables ................................................................................................
x
HYDRAULIC BOOM PUMP
AND AIR MOTOR:
Interior surfaces
Stage II corrosion .....................................................................................
x
Stage I corrosion
............................................................................................................. x
Seals
Deteriorated or leaking ............................................................................
x
DRILL ASSEMBLY:
Drill guide:
Centralizer foot
piece and drill
guide
Bent, broken or distorted ........................................................................
x
Feed chain
Stage III corrosion; cracked or broken links .........................................
x
Stage II corrosion; pins and/or rollers frozen......................................................................................................
x
Drifter drill
Stage III corrosion on internal surfaces.................................................
x
Stage II corrosion on internal surfaces .............................................................................................................
x
III-R-3