TM 55-1520-240-23-4
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INSPECT HORIZONTAL HINGE PIN AND BEARINGS
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INITIAL SETUP
Applicable Configurations:
All
Tools:
Technical Inspection Tool Kit, NSN 5180-00-323-5114
Drift, 1/8 Inch Diameter
Machinists Scribe, 0.020 Inch Diameter Point
Fluorescent Inspection Method
Materials:
Gloves (E186)
Sealant (E336)
Personnel Required:
Aircraft Powertrain Repairer
Inspector
References:
TM 1-1500-335-23
TM 1-1520-253-23
TM 55-1520-240-23P
Equipment Condition:
Off Helicopter Task
Do not touch parts with bare hands.
Wear gloves (E186). Fingerprints can
cause corrosion.
Horizontal hinge pins with serial
numbers of UW2407 and prior that do
not have a suffix "A" vibro engraved
after the serial number and with total
time since new of 4800 flight hours
or more must be replaced.
NOTE
Only shotpeened hinge pins (with
41 ) shall be installed. Look for the
letters SP following the serial number
or for part number 114R2196-6 or
114R2197-5 or 114R2197-7.
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