SusiAir PILATUS PORTER PC6, Maintenance Program

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Form ASI-PC6-Engine Preservation (Engine Inactive for Periods Exceeding 90 Days)
Reissued: 2
Revision: 1
Date: July 2020 Page 1 of 3
MAINTENANCE PROGRAM
PILATUS PORTER PC6
Ref. EMM PT6A-27 Chapter 72-00-00
PILATUS PC6 – ENGINE PRESERVATION
(Engine Inactive For Periods Exceeding 90 Days)
Aircraft
Registration
: ……………. Job Number : …………….
Aircraft S/N : …………….
NO. DESCRIPTION TASK NO. MECH. ENG. RII
1.
Do 0 to 7, 8 to 28 and 29 to 90 days procedures. N/A
Engines inactive 0 to 7 days.
(a) If the engine was operated in a salt laden environment, do a
compressor and turbine desalination wash.
N/A
(b) Engine may remain inactive with no preservation protection provided
engine is sheltered, humidity is not excessively high and there is not
extreme temperature changes that may produce condensation.
N/A
(c) Install inlet and exhaust covers. N/A
Engines inactive 8 to 28 days.
(a) Place desiccant bags and humidity indicator on wooden racks in
engine exhaust duct only.
N/A
(b) Seal off all engine openings. Make sure exhaust cover has suitable
window to monitor humidity indicators.
N/A
(c) Check relative humidity every two weeks if engine is stored outside,
and every 28 days if engine is stored inside. Relative humidity should
be maintained at 40%. If humidity indicator turns pink, replace
desiccant bags and indicator.
N/A
Engines inactive 29 to 90 days.
(a) Wash engine externally. N/A
(b) Do a compressor performance recovery/desalination wash and a
turbine rinse.
71-00-00 N/A
(c) Examine all engine external protective coating, and touch-up/repair
as necessary.
N/A
(d) Lubricate all linkages. N/A
(e) Place a suitable container under the engine. N/A
(f) Disconnect fuel inlet to oil-to-fuel heater and connect suitable oil
supply line to oil-to-fuel heater fuel inlet. Blank off disconnected fuel
supply line.
N/A
(g) Disconnect fuel line at flow divider and dump valve (PT6A-21) or from
inlet of manifold adapter (PT6A-27 and PT6A-28) to prevent
preservation oil from entering fuel manifold. Blank off elbow on
adapter or valve, as applicable.
CAUTION: UNDER NO CIRCUMSTANCES PERMIT
PRESERVATIVE OIL TO ENTER ENGINE WHERE
IT MAY COME INTO CONTACT WITH
THERMOCOUPLE PROBE ASSEMBLY. OIL
CONTAMINATION OF PROBES MAY CAUSE
COMPLETE FAILURE OF THERMOCOUPLE
SYSTEM.
N/A
(h) Supply preserving oil (PWC05-077) at 5 to 25 psig at least 16°C
(60°F) to fuel supply line on oil-to-fuel heater.
CAUTION: OBSERVE STARTER MOTOR OPERATING LIMITS.
(REF. STARTER MANUFACTURER’S MANUAL).
N/A