TM 55-1520-240-23-1
1-92
INSPECTION (Continued)
1-92
OPERATING TIME SPECIAL INSPECTION FOR AIRCRAFT ON PM/PMD
REF.
NO.
FREQUENCY
INSPECTION REQUIREMENTS
16.
100 HOURS
VISUALLY INSPECT COMBINING TRANSMISSION COOLING FAN ASSY FOR
EVIDENCE OF CONTACT BETWEEN THE IMPELLER TIPS AND FAN HOUSING (TIP
RUB INSPECTION). DO NOT REMOVE THE FAN FOR THIS INSPECTION.
17.
100 HOURS/120 DAYS
PERFORM AVIM PREVENTIVE MAINTENANCE ON AIRCRAFT BATTERY. REFER
TO TM 11-6140-203-23.
17.1.
100 FLIGHT HOURS
VISUALLY INSPECT UPPER DAMPNER ATTACHING LUG BUSHINGS P/N
145R3116-10 FOR SLIPPING/LOOSENESS. (THIS INSPECTION ONLY REQUIRED IF
BUSHING WAS FOUND LOOSE OR SLIPPING DURING INITIAL INSPECTION.)
NOTE
IF AFTER COMPLETING THE 25, 50, AND 100 HOUR BUSHING (P/N 145R3116-10)
INSPECTIONS AND THE BUSHING HAS NOT SLIPPED OR LOOSENED NO
FURTHER INSPECTIONS ARE REQUIRED.
17.2.
100 FLIGHT HOURS
INSPECT THE COMBINING TRANSMISSION COOLING FAN SHAFT PER TASK
6-182.1.
17.3.
100 FLIGHT HOURS
CHECK THE COMBINING TRANSMISSION COOLING FAN SHAFT OUTPUT
GEAR SPLINE FOR WEAR USING THE SPLINE WEAR (GO-NO-GO) GAUGE, P/N
SK33330-018.
17.4.
100 FLIGHT HOURS
PRIOR TO LUBRICATING FORWARD AND AFT SWASHPLATE ASSEMBLY BEARING,
PERFORM VISUAL INSPECTION OF BEARING IAW TASK 5-117.1.
18.
200 HOURS OF
ENGINE OPERATION
AND EVERY 50 HOURS
THEREAFTER
INSPECT AFT CONNECTING LINK (TASK 4-37).
NOTE
AFTER COMPLIANCE WITH MWO 1-1520-240-50-60, 50 HOUR INSPECTION
REQUIREMENTS IS CHANGED TO 200 HOURS OR NEAREST PHASE.
19.
300 HOURS AND
EVERY 100 HOURS
THEREAFTER
PERFORM EDDY CURRENT INSPECTION OF HUB SPLINES OR FLUORESCENT
PENETRANT INSPECT A ONE INCH WIDE ANNULAR STRIP AROUND THE SPLINE
HOLE ON THE BOTTOM SURFACE OF THE HUB OF THE FOLLOWING ROTOR
WING HEADS:
FORWARD HEAD 145R2003-1
AFT HEAD 145R2004-2
20.
DELETED
21.
1200 HOURS
ROTARY-WING HEAD
OPERATION SINCE
NEW OR OVERHAUL
INSPECT ROTARY-WING HEAD HORIZONTAL HINGE PINS AND BEARINGS FOR
SPALLING AND DAMAGE. ROTATE SERVICEABLE PINS AND BEARINGS 180
AND REINSTALL THEM. INSPECT AND ROTATE SERVICEABLE VERTICAL PIN
BEARING 180
AND REINSTALL ON ALL HEAD ASSEMBLIES EXCEPT FOR HEAD
ASSEMBLIES (145R2003-1&4) AND (145R2004-2&8) LISTED IN TASK 1-91. INSPECT
ROTARY-WING TIE BAR ASSEMBLIES PER TASK 5-23.1.1.
22.
1200 HOURS
INSPECT FUEL TANK ASSEMBLIES. REFER TO TM 55-1520-240-23-8, TASK 10-4.
Change 3
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