MD Helicopters CSP-900RMM-2, Servicing And Maintenance

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CSP − 900RMM − 2 MD Helicopters, Inc.
Rotorcraft Maintenance Manual
Page 608
Revision 29
63-20-00
(5). On ELECTRICAL MASTER panel,
set POWER switch to OFF .
(6). Remove short from chip detector.
(7). Detach connector from chip detector.
(8). Install chip detector (Ref. Section
63-20-00).
D. Transmission Serviceability Test
(1). Flush main transmission (Ref. Section
12-00-00)
(2). Perform chip detector test.
NOTE:
If test is being performed within 50
hours of last serviceability test, and filter
pop-up indicator is acceptable (Ref. Section
12-00-00, Main Transmission Flush), lu­
brication pump filter assembly replacement
is not required.
(3). Replace 3 micron transmission filter
and clean or replace 75 micron filter in
the lubrication pump filter assembly
(Ref. Sections 63-21-00 and
05-20-10).
(4). Service transmission oil (Ref. Section
12-00-00).
(5). Hover helicopter per current Rotorcraft
Flight Manual (Ref. Section 01-00-00,
Table 201), for
20 minutes and
monitor CHIP indicator.
(6). Shutdown helicopter and perform chip
detector inspection.
(7). If the amount of metal particle deposits
is larger than before transmission oil
change, or contain magnetic chips
larger than
0.14 inch (3.56 mm) in
any direction, replace transmission.
(8). If the amount of metal particle deposits
have decreased and only small amounts
are found, continue transmission in
service.
(9). After 5 hours of normal operation,
perform chip detector inspection.
(10). If the amount of metal particle deposits
have decreased and only small amounts
are found, continue transmission in
service.
E. Transmission Flush Procedure
Consumable Materials
(Ref. CSP − SPM)
Item Nomenclature
C106 Oil, Lubricating
(1). Ground run helicopter per current
Rotorcraft Flight Manual (Ref. Section
01-00-00, Table 201), until transmis­
sion temperature has stabilized.
(2). Shutdown helicopter.
NOTE:
Removing chip detector housing pro­
vides a larger drain opening and may en­
sure a better flush.
Oil, Lubricating (C106)
(3). Remove chip detector and drain
transmission oil immediately while oil
remains warm.
(4). Remove chip detector screen/valve
(housing) assembly.
(5). Drain transmission oil from heat
exchanger drain valve (Ref. Section
63-21-00).
NOTE:
Add oil to flush transmission if required
for additional cleaning.
(6). Remove lubrication pump filter assem­
bly (3 and 75 micron filters) (Ref.
Section 63-21-00).
NOTE:
Ensure lubrication pump filter impend­
ing bypass (pop-up) indicator has not popped.
(7). Inspect lubrication pump cavity for
chips or sediment (Ref. Section
63-21-00).