TM 55-1520-240-23-1
1-91
OVERHAUL AND RETIREMENT SCHEDULE
(Continued)
1-91
CH-47D Components with Fatigue Lives Less Than 10,000 Hours
COMPONENTS
PART NO.
RETIREMENT SCHEDULE
HOURS
Forward Rotor Hub
114R2050-17
3661 (Note C)
114R2050-19
3661 (Note C)
114R2050-21
3661 (Note C)
114R2050-23
3661 (Note C)
114R2050-27
2887
114R2050-29
2887
114R2050-31
2887
114R2050-35
2887
114R2050-37
2439
114R2050-39
2439
114R2050-41
2439
114R2050-43
2439
Aft Rotor Head
114R2050-18
3661 (Note C)
114R2050-20
3661 (Note C)
114R2050-22
3661 (Note C)
114R2050-24
3661 (Note C)
114R2050-28
1995
114R2050-30
1995
114R2050-32
1995
114R2050-36
1995
114R2050-38
1603
114R2050-40
1603
114R2050-42
1603
114R2050-44
1603
Bolt, Horizontal Hinge Pin
114R2201-1
1200 (Note D)
Combining Transmission Cooling Fan
145DS518-5
125
NOTES
A. To reach full retirement life it is mandatory that bearings be rotated 180 at 1200 hours. Bearings are to be rotated only once to
their unloaded side, regardless of time remaining when bearings were rotated. At no time will "time since new" in block H of rotorhead
components/parts, DA Form 2408-16, exceed 2400 hours.
B. Retirement hours shown are for shafts that have operated only on CH-47D models. Retirement hours for shafts with prior usage on
other CH-47 models have been individually calculated and dictate the allowable time for rotor head assemblies listed in Operating Time for
Rotor Head Assemblies table.
C. Rotor hubs with unmodified splines require inspection after 300 flight hours have accrued and reinspection at subsequent intervals
of 100 flight hours.
D. Replace horizontal hinge pin bolt at each 1200 hour horizontal hinge pin inspection (rotation or replacement).
E. Two separate DA Forms 2408-16 are required, one for forward transmission reporting on condition and one for reporting RC retirement
hours for forward transmission rotor shaft.
F. The following serial numbered cross shaft adapter assemblies (P/N 145D3500-16) have a finite life of 3048 hours. Replace cross
shaft adapter assemblies if finite life exceeds 3048.
A-6055
A-6080
A-6088
A-6111
A-6117
A-6456
A-6487
A-6508
A-6550
A-6571
A-6592
A-6657
A-6664
A-669
A-6708
A-6732
A-6775
A-6786
1-328
Change 2
