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Removing the Sensor Installation.
Up
TM-9-1270-219-13-P Fire and Flight Air Data Subsystem Helicopter Armament: XM 143 PN 03-004-02 Manual
Next
Figure 4-2. EPU on Helicopter Bulkhead.
TM 9-1270-219-13&P
f. Disconnect pitot and static lines from EPU.
4-8. Installing the LAI.
Disconnect fittings and clamps, as necessary, and remove
pitot and static lines.
a. Connect the aircraft electrical c o n n e c t o r
8A3J1
to the LAI.
4-6. Installing the EPU.
a. Secure the EPU to the helicopter bulkhead with
four screws (1, fig. 4-2) and washers (2).
b.
Connect
the
helicopter
electrical
connector
18A1J1 (3) to the EPU.
Ensure that screws are not dropped in the
cockpit. Loose articles are a potential
c. Connect helicopter pitot plumbing (5) to the EPU
hazard to helicopter safety.
P  T pneumatic union connector.
b. Fit LAI into Pilots Instrument Panel (fig. 4-3)
d. Connect helicopter static plumbing (4) to the
and secure with four screws.
PS p n e u m a t i c u n i o n c o n n e c t o r .
EPU
4-9. Removing the LAI.
e. Perform leak tests as specified in paragraph
4-7. Removing the EPU.
Ensure that screws are not dropped in the
a . D i s c o n n e c t t h e h e l i c o p t e r p i t o t ( PT )
pneumatic
cockpit. Loose articles are a potential
union connector (5, fig 4-2) from the EPU.
hazard to helicopter safety.
b . Disconnect the helicopter static (P  S )
pneumatic
union connector (4) from the EPU.
a. Remove four screws securing LAI to Pilots
Instrument Panel (fig. 4-3).
c.
Disconnect
the
electrical
connector
18A1J1
(3)
from the EPU.
b . Pull the LAI clear of the Pilots Instrument Panel
d. Remove the four screws (1) and washers (2)
and
disconnect
the
electrical
connector
18A3J1
from
the
securing the EPU to the helicopter bulkhead.
LAI.
4-4

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