71-10 Engine
Refer to R66 Illustrated Parts Catalog (IPC) Chapter 71.
NOTE
The electronic monitoring unit (EMU) is a serialized component
assigned to the engine. When removing the engine, remove the
engine's EMU per Section 71-43, as required.
A. Removal
1. Remove engine cowling assembly per Section 53-21.
2. Refer to Figures 71-1 and 71-2. Verify heat shrink stamping is legible (or mark wires
and cables) and remove hardware securing wires and cables to starter-generator studs.
Disconnect F059-01 (cabin) electrical harness from F049-02 (engine) harness at F577-1
bracket assembly. Disconnect cabin harness "TMP" (torquemeter oil pressure) and
"MOP" (main oil pressure) plugs from engine sensors; disconnect cabin harness plug
from N2 speed sensor.
3. Pull fuel shut off valve OFF. Disconnect B283-12 (fuel) hose assembly B-nut from
engine fuel inlet fitting. Cap fitting and plug line.
4. Remove hardware securing MS21919WDG36 clamp to firewall, and loosen B277-
32 clamps securing A785-37 hose to inducer bleed port and G918-1 box assembly.
Remove hose and clamps. Install cover on inducer bleed port and tape box assembly to
protect openings from contaminants.
5. Remove hardware securing G391-1 (customer air) line assembly clamps. Loosen line
assembly B-nut from G391-5 line assembly union and disconnect B-nut from engine
compressor union. Cap fitting and plug line.
6. Drain engine oil per Section 12-60; drain engine oil per RR300 Operation and Maintenance
Manual (OMM). Refer to Figure 79-2. Remove hardware securing F723 oil line assembly
clamps. Loosen F723-1, F723-2, and F723-3 line assembly B-nuts from F649-1 oil cooler
and G689-1 oil tank assembly unions; disconnect B-nuts from engine fittings. Cap fittings
and plug lines.
7. Refer to Figure 63-1. Remove hardware securing F018-1 clutch assembly yoke to (aft)
A947-2 plate assembly, noting hardware removed.
8. Refer to Figure 76-1. Remove fasteners securing C522-10 (throttle) and A522-10 (fuel
cutoff) control inner wires to FCU throttle and fuel cutoff levers. Remove fasteners securing
control housings and AN742-4 clamps to F577 bracket assemblies. Refer to Figure 76-2.
Remove cotter pin and washer securing C522-11 (power turbine governor) control inner
sleeve and D333-13 fitting to PTG input lever; disconnect control from lever.
9. Remove exhaust per Section 71-30.
10. Connect engine hoist to G200-1 engine lifting lug. Support engine during mounting
hardware removal.
11. Cut and discard safety wire and remove two bolts securing bottom engine mount to
F174-1 support weldment. Cut and discard safety wire and remove two bolts (one per
side) securing side engine mounts to F046 lower frames.
12. Carefully remove engine; verify F579-1 bellmouth is clear of firewall, and loose wires, cables,
fittings and line assemblies are clear of engine during separation. Install bellmouth cover.
13. Prepare engine for Rolls-Royce maintenance facility per Section 71-11, as required.
SEP 2012 R66 Maintenance Manual Chapter 71 Powerplant Page 71.3
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