Textron Bell 412, Руководство по обслуживанию

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BHT-412-MM-2
5-00-00
26 FEB 2013 Rev. 16 Page 81 Export Classification C, ECCN EAR99
c. Fasteners attaching cylinder lower supports to
structure for looseness.
d. Cylinder lower bearings for looseness.
e. Actuator assembly for damage and leakage.
f. Cylinder extension tube for condition and security.
g. Actuator linkage, balance spring, and bracket for wear
and security.
h. Clean exposed area of actuator piston with hydraulic
fluid and a clean lint-free cloth.
i. Check hydraulic cylinder piston rod for evidence of
excessive wear and scoring. Wear of the piston rod indicates
cylinder assembly is incorrectly aligned to lower support and
requires adjustment.
j. Remove bolts attaching actuator to lower supports.
Check cylinder alignment to lower support. Rod end bearing
side loads are not permitted. Install bolts.
k. Torque check nuts attaching actuator cylinder to upper
supports.
BHT-ALL-SPM l. Upper cylinder housing mounting bracket cavity for
corrosion. Cavity drain hole for obstruction. Reapply corrosion
preventive compound (C-104) as required. Dust boot for
condition.
Chapter 67 4. Collective control tubes:
a. Control tubes between collective jackshaft and
collective control actuator pilot valve input lever for corrosion,
wear, and damage.
b. Control tube bellcrank, supports, and attaching
hardware for corrosion, wear, and damage.
Chapter 67 5. Cyclic flight control actuators:
a. Universal bearings for looseness.
SCHEDULED INSPECTIONS
5-10. 300 HOUR/12 MONTH INSPECTION — PART B (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER