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

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CSP − 900RMM − 2 MD Helicopters, Inc.
Rotorcraft Maintenance Manual
Page 616
Revision 34
28-00-00
(5). Apply and maintain a constant 2.0 psig
(13.8 kPa) or 56 inch (142 cm) of
water
regulated air pressure to the
crossfeed valve shroud drain hose
(0.250 inch ID rubber hose).
(a). With the air pressure applied, the
manometer (T2014-4) must indicate
28 to 56 inch (71 to 142 cm) of
water
.
(6). With air pressure applied, do a check
for external leakage of the shrouds and
drains with liquid leak detector (C809).
(a). Repair or replace as necessary and
retest.
(7). If test is successful, remove air source
from crossfeed valve drain hose.
(8). Unplug and reconnect left and right
vapor shroud drain hoses to the engine
drain hose tee fittings.
(9). Unplug the left and right fuel cell
frangible valve outlet shroud drain
hoses.
(10). (Pre-TB900-003) Install access panels
AL165, AR165, A235, AL250, and
AR250 (ref. Section 53-20-00).
(Post-TB900-003) Install access
panels L211 and R211 (ref. Section
06-00-00).
B. Fuel Supply Vapor Shroud Leak
Check/Pressure Test (900 CONFIG) With
Supplemental Fuel System
(Ref. Figure 603)
Consumable Materials
(Ref. CSP − SPM)
Item Nomenclature
C702 Lockwire
C809 Leak Detector, Liquid
Special Tools
(Ref. CSP − SPM)
Item Nomenclature
T2014 − 4 Manometer
T2014 − 5 Adapter
T2014 − 6 Regulator, Air Pressure
NOTE:
This functional test is typical for LH or
RH Fuel Vapor Shroud System. Repeat test
for the opposite side fuel vapor shroud sys­
tem.
The rotorcraft must be defueled
before both access panels AL165
and AR165 are removed. Structural damage
can occur if both of these panels are re­
moved with fuel in the rotorcraft. Panel
AL165 or AR165 can be removed individual­
ly without a defuel of the rotorcraft.
(1). (Pre-TB900-003) Remove access
panels AL165, AR165, A235, AL250,
and AR250 (ref. Section 53-20-00).
(Post-TB900-003) Remove access
panels L211 and R211 (ref. Section
06-00-00).
(2). Disconnect the left or right vapor
shroud drain hose (0.250 inch (6.35
mm) ID rubber hose) from the engine
drain hose tee fitting.
(3). Plug or clamp shut the drain hose.
(4). Apply and maintain a constant 2.0 psig
(13.8 kPa) or 56 inch (142 cm) of
water
regulated air pressure to the left
or right fuel cell frangible valve outlet
shroud drain hose
(0.250 inch (6.35
mm) ID rubber hose).
(a). With the air pressure applied, the
manometer (T2014-4) must indicate
28 to 56 inch (71 to 142 cm) of
water
.
(5). With air pressure applied, do a check
for external leakage of the shrouds and
drains with liquid leak detector (C809).
(a). Repair or replace as necessary and
retest.
(6). If test is successful, remove air source
from fuel cell frangible valve outlet
shroud drain hose.
CAUTION