MD Helicopters MD Explorer - Fuel Pressure Switch Assembly Installation

CSP−900RMM−2 MD Helicopters, Inc.
Rotorcraft Maintenance Manual
Page 438
Revision 24
28-00-00
B. Fuel Pressure Switch Assembly
Installation
(Ref. Figure 414)
NOTE: This task is typical for LH and RH Fuel
Pressure Switch installation.
Consumable Materials
(Ref. CSP−SPM)
Item Nomenclature
C109 Grease
C222 Fluorosilicone Compound
C230 Sealant, Electrically Conductive
C702 Lockwire
C818 Sleeve, Protective, Expandable and
Insulating
C819 Insulation Sleeving, Electrical, Heat
Shrinkable
(1). Install switch wires in connector.
(a). Install expandable sleeving (C818)
over wires.
(b). Install heat shrinkable sleeving
(C819) on wires and shrink over
electrical pin splices.
(c). Install electrical pins in connector
with insertion tool (Ref. CSP-SPM,
Section 20-60-00).
Fluorosilicone Compound (C222)
(d). Apply fluorosilicone compound (C222)
to back of connector and wires and
allow to cure.
(2). Prepare vapor shroud box (9) and vapor
shroud box cover (2) surface for electri
cal bonding (Ref. CSP-SPM).
Grease (C109)
(3). Lubricate O-ring (11) lightly with
grease (C109) and install on fuel
pressure switch assembly (12).
(4). Install fuel pressure switch assembly
(12) with vapor shroud box cover (2) in
fuel interconnect tee fitting (10). Torque
fuel pressure switch.
Sealant, Electrically Conductive (C230)
(5). Apply sealant (C230) to faying surfaces
between vapor shroud cover and vapor
shroud box and install fuel vapor
shroud box cover assembly (2) with
bolts (14) and washers (13). Torque
bolts.
(6). Attach connector (1), and safety with
lockwire (C702).
NOTE: Allow sealant (C230) to fully cure prior
to pressure test.
(7). Perform fuel cell leak check/pressure
test (Ref. Section 28-00-00).
(8). Perform fuel supply vapor shroud leak
check/pressure test (Ref. Section
28-00-00).
(9). Fuel helicopter (Ref. Section 12-00-00).
(10). Perform fuel booster pump operational
test (Ref. Section 28-00-00).
(11). Install baggage compartment floor
panels; A235, AL250, AR250 (Ref.
Section 53-20-00).
(12). Close baggage compartment door L262
(Ref. Section 06-00-00).