Form ASI/PC6-Audible Rubbing, Binding And Scraping
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 – AUDIBLE RUBBING, BINDING AND SCRAPING
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
NOTE:
Any unusual engine noise requires immediate investigation.
1.
Rotate compressor rotor and listen for any interference of rotating
components with stationary parts and/or check for rapid deceleration on
shutdown.
N/A
a.
Do a visual inspection of the first-stage compressor rotor with a
borescope or with the air inlet screen removed.
72-30-05
N/A
b.
Check for rear accessory case mounted accessory drag
N/A
c. Check for compressor turbine tip rub
72-50-02
N/A
d. Check for the indications of compressor rub or bearing or AGB
distress or unusual deposits seen on CT blade airfoil. Send engine to
an approved overhaul facility for light overhaul
N/A
NOTE
: If you find deposits, look for the presence of debris at the
bottom of the gas generator case. If you see one of these
conditions, contact P&WC Customer Engineering for
recommendations.
e. If no damage is found and condition is still present for one hour after
shutdown, send the engine to an approved overhaul facility
N/A
2.
Rotate the propeller and listen for any interference of rotating components
with stationary parts (Ref. Para. A. (4)). If power turbine rotor rattles, or if
there is rubbing or scraping, slow propeller acceleration on start or abrupt
deceleration on shutdown:
N/A
a. Examine PT disk assembly and exhaust area through exhaust ports
for evidence of distress.
N/A
b. If damage is found, inspect.
72-50-04
N/A
c. Slow or stiff propeller rotation. Send power section to an approved
overhaul facility for Light Overhaul. Indicate rubbing.
N/A
3.
If the suspected problem cannot be repeated or confirmed:
a. Remove and inspect RGB chip detector, oil strainer, and main oil
filter. If metallic debris is found, refer to FAULT ISOLATION.
72-10-00,
79-20-02
N/A
b. Run engine at 80% TO power for ten minutes. Remove and inspect
RGB chip detector, oil strainer, and main oil filter (Ref.). If no metallic
debris is found, return engine to service and check RGB chip detector
daily for one week (25 hours minimum).
N/A
c. Inspect main oil filter after one week (25 hours minimum, 65 hours
maximum). If no metallic debris is found, return to standard
inspection intervals.
79-20-02
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...
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Page 122: ...Form ASI PC6 Engine Removal Reissued 2 Revision 1 Date July 2020 Page 6 of 25...
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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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Page 244: ...Form No ASI MD 90 Revision 3 July 2020 Page 4 of 8...
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