TB 1-1520-240-20-152
least one full turn (360 degrees) to ensure thorough purging of the bearing. Pump until clean grease ap-
pears all the way around the line between the stationary upper seal and rotating upper seal.
NOTE
It is important to collect as much purged used grease as possible to
improve chances of capturing any grease areas that have a higher
concentration of metal contaminates.
(b) As the old/used grease appears from between the seals, use a clean wooden tongue de-
pressor to collect as much of the grease as possible in a clean container. Label the container with the
date, aircraft number, swashplate assembly part number and serial number, swashplate time since over-
haul, and hours since last purge.
(c) Thoroughly stir the collected grease to ensure a homogenous moisture. While stirring,
visually inspect for orange/red/grey/brown rubber pieces/slivers. If there are any visible pieces/slivers,
the swashplate is considered unserviceable and will be disposed of in accordance with paragraph 11d
of this Technical Bulletin.
(d) After stirring the grease, feel for metal particles. If there are particles, the swashplate is
considered unserviceable and will be disposed of in accordance with paragraph 11d of this message.
(e) If the swashplate is considered serviceable, retain the collected grease pending the re-
sults of next 50 hour lubrication/purge and grease inspection.
c. Change the DA Form 2408-18, Block 6 (Reference) from "CH-47-03-01" to CH-47-04-01" for the
100/150 flight hour recurring FWD & AFT Swashplate bearings and the 50 flight hour recurring FWD & AFT
Swashplate bearings inspections. ULLS-A units shall use this message as authority to change the Reference
for inspections A-182 and A-121.
d. Change the initial entry from 5a and note compliance on DA Form 2408-5-1 (Swashplate Assy).
cluding war reserves)
a. Items in Retail Stock - Commanders and facility managers that maintain retail stock at installation
level and below will complete the following procedures.
(1) Contact the supported aviation unit, as required, to perform the procedures required on af-
fected items.
(2) Submit a Task/Inspection report in accordance with paragraph 5b.
b. Items in Single Stock Fund and in Work (Overhaul/Repair Facility) - N/A.
c.
Items in Wholesale Stock - N/A.
10. Special Tools and Fixtures Required. N/A.
5
Previous Page
