CSP−HMI−2
MD Helicopters, Inc
.
MAINTENANCE MANUAL
67−10−00
Page 607
Revision 39
10. Copilot’s Cyclic Control Stick Inspection
Consumable Materials
(Ref. Section 91
−
00
−
00)
Item
Nomenclature
Petrolatum
(1). Inspect quick−release pins for secure
fit, also stick tube and socket for
security, distortion and corrosion.
Check for presence of a light coating of
grease in socket and on stick tube end.
Apply thin coating of petrolatum
(CM114), on contact surfaces.
(2). To check controls installation, loosen
lateral and longitudinal friction knobs,
move stick and check for binding or
unusual noises. Check that rod end
bearings of copilot’s lateral control rod
do not jam throughout full range of
stick travel.
NOTE:
Set minimum friction so that phenolic
washers can be slightly turned by hand. If
minimum friction is set too low, stick shake
will occur.
11. One
−
Way Lock Inspection
(1). Replace reservoir if cracked, leaking or
has loose or damaged filler cap (Ref.
COM).
NOTE:
It is normal for a thin hydraulic oil film
to remain on piston as a result of wiping
contact with the piston seal. This should not
be considered leakage or cause for rejection.
(2). Replace forward input rod end bearing
if bearing binds.
Do not attempt to adjust larger
(aft) of two rod ends and do not
remove cotter pin; malfunction of lock will
likely result. (For overhaul and replacement
instructions, Ref. COM).
(3). Replace one−way lock if aft (output) end
bearing binds.
(4). Replace protective boot if it is cracked,
torn or deteriorated.
(5). Replace one−way lock if exposed portion
of piston has nicks, scratches or wear
penetrates chrome plating.
(6). Replace external mounting bushing if
outside diameter is less than 0.4979
inch (12.64666 mm).
(7). One−way lock must be replaced if nicks,
dents and scratches to body exceed
0.040 inch (1.016 mm) depth after
repair.
(8). One−way lock must be replaced if end
play between rod ends exceeds 0.010
inch (0.254 mm) measured at input
(forward) end.
(9). One−way lock must be replaced if
leaking, except as noted for reservoir in
step (1). above.
12. Cyclic Trim Actuator Inspection
(1). Inspect electrical connector for evidence
of damage, and broken or missing
contacts.
(2). Inspect exterior of trim actuator for
evidence of damage and deformation.
(3). When actuator speed (response and/or
travel time) is questionable, perform
bench test (Ref. Cyclic Trim Actuator
Bench Test).
13. Cyclic Control System Operational Check
Excessive slack or free play in the cyclic
control system may result in premature
control stop contact or roughness of the
helicopter and fanning out (out of track) of the
main rotor tip path plane (Ref. Sec.
18−10−00/60). Areas to be checked include
mixer linkages (Ref. Sec. 62−30−00/60) at the
base of the main rotor mast, rotating controls
above the swashplate, trim actuators, and
cyclic control stick in the pilot’s compartment.
If total free play at the top of the cyclic grip
exceeds 3/8 inch (9.525 mm) in either longitu-
dinal or lateral direction, perform the follow-
ing:
CAUTION
