Form ASI-PC6-Loss of Oil Pressure
Reissued: 2
Revision: 1
Date: July 2020
Page 1 of 2
MAINTENANCE PROGRAM
PILATUS PORTER PC6
Ref. EMM PT6A-27 Chapter 72-00-00
PILATUS PC6 – LOSS OF OIL PRESSURE OR LOW OIL PRESSURE
Aircraft
Registration
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Job Number
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Aircraft S/N
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NO.
DESCRIPTION
TASK NO.
MECH.
ENG.
RII
CAUTION:
IF AIRCRAFT OIL SYSTEM CONTAMINATION IS SUSPECTED, REVERSE FLUSH ENGINE OIL SYSTEM,
INCLUDING OIL-TO-FUEL HEATER. AIRCRAFT OIL COOLER MUST BE REJECTED.
NOTE:
Low oil pressure is defined as running the engine with the oil pressure below limits. (Ref. 71-00-00).
1.
If the loss of oil is 6 qt. or more, resulting in fluctuation of oil pressure or
torque indication or oil pressure dropped below minimum value.
(a) Check oil pressure and torque indicating system. If correct, and the
engine did not run above 1315 lb.ft. (PT6A-21), 1628 lb.ft. (PT6A-
27/28) torque with oil pressure below 80 psig (minimum time running
is permitted to allow flight crew to follow the emergency procedure),
remove main filters, strainer and chip detector. If metallic debris is
found refer to 79-20-04, Inspection.
NOTE: 1.
Oil pressures below 40 psig are unsafe and require either
the engine to be shut down or an emergency landing
made as soon as possible, using minimum power to
sustain flight.
NOTE: 2.
If oil pressure fluctuates or drops below 80 psig, reduce
the engine power from the maximum of 1315 lb.ft.
(PT6A-21), 1628 lb.ft. (PT6A-27/28) torque. The engine
may be kept running provided that the oil pressure does
not fall lower than 40 psig; however the torque indicating
system will be unreliable at this low pressure. Minimum
time running is permitted to allow the flight crew to follow
emergency procedure.
79-20-04
N/A
(b) Turn the propeller by hand and listen for unusual noises coming from
the reduction gearbox or PT bearings. If unusual noises are heard,
send power section to an approved overhaul facility for Light
Overhaul. Indicate unusual oil conditions.
NOTE:
PT blades may rub, immediately after engine shutdown
which is not an indication of distress, providing the
rubbing/noise disappears after engine cool down.
N/A
(c) Turn the compressor rotor. Listen for unusual noises coming from
bearings, seals, gears, compressor and/or CT.
N/A
(d) If unusual noises are heard, send gas generator to an approved
overhaul facility for Light Overhaul. Indicate unusual oil conditions
N/A
(e) Remove main oil filter, strainer and chip detector and inspect for
metallic debris. If metallic debris is found, refer to FAULT
ISOLATION. If no metallic debris is found, reinstall main oil filter,
strainer and chip detector. Run the engine at 80% TO power for 10
minutes; recheck RGB chip detector, oil strainer and main oil filter. If
no metallic debris is found return engine to service. Inspect chip
detector daily for one week (approx. 65 flight hours) and main oil
filter after seven days (approx. 15 flight hours). If no metallic debris is
found, return to standard inspection intervals. If metallic debris is
found, refer to FAULT ISOLATION.
N/A
2.
If the engine was kept running above 1315 lb.ft. (PT6A-21), 1628 lb.ft.
PT6A-27/28) torque with oil pressure below 80 psig (Ref. 71-00-00),
check oil pressure and torque indicating systems; and if correct, remove
the engine and send it to an overhaul facility for Light Overhaul. Indicate
low oil pressure.
N/A
Summary of Contents for PILATUS PORTER PC6
Page 2: ...MAINTENANCE PROGRAM PILATUS PC 6 DOCUMENT NUMBER SAP 27 REISSUE 2 REVISION 1 JULY 2020...
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Page 97: ...Form ASI PC6 Engine Installation Reissued 2 Revision 1 Date July 2020 Page 7 of 26...
Page 98: ...Form ASI PC6 Engine Installation Reissued 2 Revision 1 Date July 2020 Page 8 of 26...
Page 99: ...Form ASI PC6 Engine Installation Reissued 2 Revision 1 Date July 2020 Page 9 of 26...
Page 100: ...Form ASI PC6 Engine Installation Reissued 2 Revision 1 Date July 2020 Page 10 of 26...
Page 101: ...Form ASI PC6 Engine Installation Reissued 2 Revision 1 Date July 2020 Page 11 of 26...
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Page 105: ...Form ASI PC6 Engine Installation Reissued 2 Revision 1 Date July 2020 Page 15 of 26...
Page 106: ...Form ASI PC6 Engine Installation Reissued 2 Revision 1 Date July 2020 Page 16 of 26...
Page 107: ...Form ASI PC6 Engine Installation Reissued 2 Revision 1 Date July 2020 Page 17 of 26...
Page 108: ...Form ASI PC6 Engine Installation Reissued 2 Revision 1 Date July 2020 Page 18 of 26...
Page 109: ...Form ASI PC6 Engine Installation Reissued 2 Revision 1 Date July 2020 Page 19 of 26...
Page 110: ...Form ASI PC6 Engine Installation Reissued 2 Revision 1 Date July 2020 Page 20 of 26...
Page 111: ...Form ASI PC6 Engine Installation Reissued 2 Revision 1 Date July 2020 Page 21 of 26...
Page 112: ...Form ASI PC6 Engine Installation Reissued 2 Revision 1 Date July 2020 Page 22 of 26...
Page 113: ...Form ASI PC6 Engine Installation Reissued 2 Revision 1 Date July 2020 Page 23 of 26...
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Page 123: ...Form ASI PC6 Engine Removal Reissued 2 Revision 1 Date July 2020 Page 7 of 25...
Page 124: ...Form ASI PC6 Engine Removal Reissued 2 Revision 1 Date July 2020 Page 8 of 25...
Page 125: ...Form ASI PC6 Engine Removal Reissued 2 Revision 1 Date July 2020 Page 9 of 25...
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Page 131: ...Form ASI PC6 Engine Removal Reissued 2 Revision 1 Date July 2020 Page 15 of 25...
Page 132: ...Form ASI PC6 Engine Removal Reissued 2 Revision 1 Date July 2020 Page 16 of 25...
Page 133: ...Form ASI PC6 Engine Removal Reissued 2 Revision 1 Date July 2020 Page 17 of 25...
Page 134: ...Form ASI PC6 Engine Removal Reissued 2 Revision 1 Date July 2020 Page 18 of 25...
Page 135: ...Form ASI PC6 Engine Removal Reissued 2 Revision 1 Date July 2020 Page 19 of 25...
Page 136: ...Form ASI PC6 Engine Removal Reissued 2 Revision 1 Date July 2020 Page 20 of 25...
Page 137: ...Form ASI PC6 Engine Removal Reissued 2 Revision 1 Date July 2020 Page 21 of 25...
Page 138: ...Form ASI PC6 Engine Removal Reissued 2 Revision 1 Date July 2020 Page 22 of 25...
Page 144: ...Form ASI PC6 Propeller Installation Reissued 2 Revision 1 Date July 2020 Page 3 of 7...
Page 145: ...Form ASI PC6 Propeller Installation Reissued 2 Revision 1 Date July 2020 Page 4 of 7...
Page 151: ...Form ASI PC6 Propeller Removal Reissued 2 Revision 0 Date October 2019 Page 3 of 7...
Page 152: ...Form ASI PC6 Propeller Removal Reissued 2 Revision 0 Date October 2019 Page 4 of 7...
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