TB 1--1520--237--20--216
(2) Retail Stock. N/A.
g.
Component/Parts In Work (Depot Levels and Others). N/A.
2.
Task/Inspection Suspense Date. Within next 10 flight hours/14 days.
3.
Reporting Compliance Suspense Date. No later than 3 January 2000 IAW 14.a of this TB.
4.
Summary of the Problem.
a. During an inspection it was found that the wire bundle for the pilots cyclic stick was causing interfer-
ence with stick movement when the stick was pushed all the way to the left side. This is a safety concern
since it could prevent movement of the cyclic stick through its full range of motion. A subsequent inspection
of 46 aircraft at Fort Rucker revealed 30 of the inspected aircraft required repositioning of the wire bundle
on one or both cyclic sticks to avoid a potential interference problem.
b.
c. The purpose of this message is to require a one time inspection of the cyclic stick wire bundles on
every aircraft in the fleet and eliminate any interference that may exist. All wire bundle installations which
do not have the proper clearances will be repositioned. In addition, the technical manuals will be changed
to provide more detailed installation instructions for the cyclic wire bundles, including requirements to ensure
proper clearances.
5.
End Items to be inspected . All H--60 aircraft.
6.
Assembly components to be Inspected. N/A.
NOMENCLATURE
PART NUMBER
Control stick, aircraft pitch pilots and copilots
70400--01222--041
Stick Assy
70400--01222--045
Stick Assy, Pilot and Copilot, pitch
70400--01222--048
Stick Assy, Pilot and Copilot Cyclic Pitch
70400--01222--049
Stick Assy, Pilot and Copilot Cyclic Pitch
70400--01222--050
Stick Assy, Pilot and Copilots Cyclic Pitch
70400--85222--043
7.
Parts to be Inspected . N/A.
Inspection Procedures.
a.
Unzip cyclic stick boots on both the pilots and copilots sticks.
b. Visually inspect each wire harness in the area adjacent to the cyclic stick stops. Inspect for chafing
or wear. Repair as required. Re--attach harness.
c. Check that the harness is held securely in the airframe clamp and cannot be slid through the clamp
under light finger pressure. If harness does not meet these criteria, re--attach harness utilizing the applicable
d.
Apply hydraulic power to the aircraft.
e. With collective half way up and pedals centered, move the cyclic stick through the full range of mo-
tion (full left to right and full forward to AFT). Throughout the full control range, the pilots and co--pilots wire
harnesses must must remain clear of all cyclic stick stops. If the harness do not remain clear of the stick stops,
re--clamp, utilizing the applicable clamping procedure specified in paragraph 9.
f.
Return cyclic and pedals to centered position, collective full down, and turn off hydraulic power.
g.
Zip up both cyclic stick boots.
2