TB 1-1520-240-20-83
c. Remove filler plugs. One from each tank.
d. Remove one drain plug. Observe oil flow. If oil flow is present,1 oz. minimum, inspection is complete for that
drain. Reinstall drain plug and torque to 16-32 lb-in. If oil flow is not observed, probe the drain hole with a piece
of safety wire to free any obstructions. If oil flow is not observed, proceed to paragraph 9.
e. Repeat inspection of each drain (12 per aircraft).
f.
Fill the tank with lubricating oil per manual. Reinstall filler plugs. Torque plugs to 60-108 lb-in. Lock- wire filler
plugs and drain plugs per MS33540 (12 per A/C).
9. Correction Procedures. If oil flow is not observed, rotor head shall be removed from the aircraft and a QDR
submitted.
10. Supply/Parts and Disposition.
a.
Parts Required. Items cited in paragraphs 6 and 7 may be required to replace defective items.
b. Requisitioning Instructions. Requisition replacement parts through normal supply channels using normal supply
procedures. All requisitions shall use project code "XCA" per this TB.
NOTE
Project code "XCA" is required to and establish a data base of stock fund expenditures.
c. Bulk and Consumable Materials.
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
LOCKWIRE
MS20995NC32
9505-00-355-6072
LUBRICATING OIL
MIL-L-7808
d. Disposition. Dispose of removed parts/components in accordance with normal supply procedures. A QDR is
required. Hold any unserviceable part/component pending disposition instructions from technical/logistical point
of contact per paragraph 16 below.
e. Disposition of Hazardous Material. N/A.
11. Special Tools, Jigs and Fixtures Required. N/A.
12. Application.
a. Category of Maintenance. AVUM. Aircraft downtime will be charged to AVUM.
b. Estimated Time Required.
(1) Total of 2 man-hours using 1 person.
(2) Total of 2 hours downtime for one end item.
c. The cost of doing the inspection. The estimated cost impact of stock fund items to the field for replacement of
either forward or aft head, if required:
NOMENCLATURE
PART NUMBER/
COST EACH
NATIONAL STOCK NUMBER
AFT ROTOR WING HEAD
145R2004-20/1615-01-391-4399
8,167
FWD ROTOR WING HEAD
145R2003-10/1615-01-301-4398
7,677
Maximum total cost per aircraft = 5,844
d. TB/MWOs to be Applied Prior to or Concurrently with this Inspection. N/A.
e. Publications Which Require Change as a Result of This Inspection. TM 55-1520-240-23-4 and TM 1 -1520-252-
23-5 shall be changed to reflect this TB requiring this inspection prior to installation of the
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