Kodiak 100 Series User Manual

Pilot’s Operating Handbook
8-17
DO NOT USE FOR FLIGHT OPERATIONS
Section 8
HANDLING, SERVICE & MAINTENANCE
100 SERIES
Service
CAUTION: Always observe starting cycle limitations when conducting a
compressor motoring wash.
period of time and cause deterioration in engine performance. A desalination
wash is performed solely for the purpose of removing salt deposits. A
performance recovery wash removes baked-on deposits and improves engine
performance. A motoring wash is performed at a gas generator RPM of 14%
Ng
. The water, cleaning solution, and rinsing solution are injected at different
pressures, depending on the ambient temperature and the type of wash
method being accomplished.
The frequency and method of washing is determined by the operating
environment. If the aircraft is operated in a continuous salt laden
environment, a desalination wash is recommended following the last ight
of the day and should be accomplished as a motoring wash. Occasional
operation in salt laden environments may necessitate a weekly desalination
wash accomplished with the motoring method. Less severe and more general
operating environments are not as conducive to rapid buildup of deposits,
but may eventually lead to deterioration in performance, necessitating a
performance recovery wash at intervals of 100-200 hours.
A variety of cleaning agents are recommended for mixing with water to form the
cleaning solution to be used for compressor washes. The mixture proportion
is not identical for all cleaning solutions. Depending on the prevailing ambient
temperature, aviation kerosene and methanol must be added to the cleaning
solution in varying proportions. Quality drinking water should be used when
performing a motoring wash. For more information concerning compressor
washes, refer to the Pratt & Whitney Canada PT6A-34 Maintenance Manual.
Compressor Turbine Blade Wash
Pratt & Whitney Canada has developed a procedure for performing a
compressor turbine blade motoring wash. This technique facilitates the
removal of contaminants from the compressor turbine blade surfaces, which
increases the blade service life. With this method, a water (or water and
methanol) solution is injected directly into the combustion chamber through
a special spray tube installed in one of the igniter plug ports. This method
of engine wash does not replace the need for accomplishing regular engine
compressor washes for performance recovery or desalination purposes.
Compressor turbine blade washing is accomplished using potable water at
ambient temperatures of 2°C (36°F) and greater. Water/methanol solutions
may be used at temperatures lower than 2°C (36°F). Refer to the Pratt
& Whitney PT6A-34 Maintenance Manual for solution strengths, washing
procedures and limitations.
Uncontrolled if printed

Kodiak 100 Series Specifications

General

Manufacturer	Daher
Engine	Pratt & Whitney Canada PT6A-34
Service Ceiling	25, 000 feet
Seating Capacity	10
Crew	1-2
Range	1, 132 nautical miles
Type	Utility aircraft
Length	34 feet 2 inches
Wingspan	45 feet
Max takeoff weight	7, 255 pounds
Power Output	750 shp
Cabin Width	4 feet 6 inches