71-12 Preparing Engine for Helicopter Installation (continued)
7. Install engine-supplied rear PTO pad cover, and engine-supplied nuts and spacers.
Special torque nuts per Section 20-33 and torque stripe per Figure 5-1.
8. Position F593-3 plate on bottom of engine gearbox and install aft bolt, finger tight.
9. Install G426-1 switch assembly in fuel pump BF (before filter) port. Special torque
switch per Section 20-33 and torque stripe per Figure 5-1.
10. Install MS29512-3 packing on A919-0D reducer and install reducer in fuel pump AF (after
filter) port. Special torque reducer per Section 20-33 and torque stripe per Figure 5-1.
11. Install MS29512-3 packing on A919-2D reducer and install reducer in fuel pump DRAIN
port. Special torque reducer per Section 20-33 and torque stripe per Figure 5-1.
12. Connect F727-1 line assembly to fuel pump’s A919-2D reducer. Connect F727-2
line assembly to engine fireshield’s drain fitting. Install one MS21919WCH4 clamp
around each line, install hardware securing lines to combustion section’s plug flange,
and tighten screw. Special torque F727-1 line assembly nut at reducer per Section 20-
33 and torque stripe per Figure 5-1; special torque F727-2 line assembly at fireshield’s
drain fitting and torque stripe per Figure 5-1. Verify security.
13. Connect F741-1 line assembly to G426-1 switch assembly and fuel pump’s A919-0D
reducer. Special torque nuts per Section 20-33 and torque stripe per Figure 5-1.
14. Install engine inlet bellmouth per Section 71-23 Part B steps 1 & 2. Install bellmouth cover.
15. To install F049-09 harness assembly:
a. Position F577-1 bracket assembly on F049-09 harness assembly’s D38999-20FC
connector so connector’s main keyway will face outboard. Install and tighten
hardware; verify security. Install bracket on (right side of) engine gearbox, special
torque nuts per Section 20-33, and torque stripe per Figure 5-1.
b. Install MS21919WCH8 clamp around harness assembly and install clamp on F577-3
bracket assembly. Install and tighten hardware. Install bracket on (right side of) engine
gearbox, special torque nuts per Section 20-33, and torque stripe per Figure 5-1.
c. Connect harness to D745-3 pressure switch assembly at connectors. Verify
security. Install (2) MS3367-7-9 ty-raps to secure plug. Cinch ty-raps until snug
without overtightening and trim tips flush with heads.
d. Connect harness plug to engine magnetic plug near oil line unions. Verify plug
security.
e. Install harness wire terminals (white-to-white, green-to-green) on measured gas
temperature (MGT) thermocouple studs. Install hardware, special torque nuts per
Section 20-33, and torque stripe per Figure 5-1.
f. Verify (2) engine-supplied MS9592-050 brackets are installed on engine lube oil
filter assembly per Rolls-Royce SB RR300-72-014. Install (2) MS21919WCH4
clamps around harness assembly and install clamps on brackets. Install and tighten
hardware; verify security.
g. Connect harness plugs to anti-ice valve assembly solenoid, anti-ice pressure switch
assembly, and N
1
speed pick-up assembly. Verify security.
Page 71.8 Chapter 71 Powerplant R66 Maintenance Manual SEP 2012
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