Mahindra GIPPSAERO GA8-TC 320 - Page 121

C01-01-08 5 Feb 2009 Page 7-7
Section 7
Aircraft & Systems
Model GA8-TC 320 Description
of oil through the breather, normally 10 - 11 US quarts as measured on the dipstick is sufcient
for routine operations rather than the full 12 US quarts. For engine oil grade and specications,
refer to Section 2 of this manual.
An oil pressure indicator and red oil pressure warning light is provided on the instrument panel.
WARNING:
THE ABSOLUTE MINIMUM SAFE OIL QUANTITY IN SUMP IS 2.7 LITRES
(2.8 US QUARTS). IF THE ENGINE IS TO BE OPERATED BELOW THE
RECOMMENDED OPERATING OIL QUANTITY OF 8.5 LITRES (9 US QUARTS)
THE OIL CONSUMPTION SHOULD BE CLOSELY MONITORED.
New Engine Break-in and Operation The engine has undergone a run-in at the factory and is
ready for normal operation. It is however suggested that a minimum of 65% and preferably 75%
power be used for cruising until a total of 50 hours has accumu lated or until the oil consumption
has stabilised. This will assist with proper seating of the rings and minimise the possibility of
cylinder wall glazing. This procedure also applies following cylinder replacement or top overhaul
of one or more cylinders. With the turbocharger engine, only ashless dispersant oil must be
used. This includes the engine brake-in period (Textron Lycoming Service Instruction No.
1014M).
WARNING:
ASHLESS DISPERSANT OIL SHOULD BE USED DURING THE BREAK-IN
PERIOD. REFER TO SECTION 2 OF THIS MANUAL FOR SPECIFICATIONS.
Ignition System Engine ignition is provided by two engine driven magnetos (pressurised), as
well as two spark plugs in each cylinder. The right magneto res the upper right and the lower
left spark plugs, and the left magneto res the upper left and the lower right spark plugs. Normal
operation is conducted with both magnetos on due to the more complete burning of the fuel-air
mixture with dual ignition sources. The individual magnetos are selected using the conventional
OFF-R-L-BOTH-START key switch located on the left hand side of the instrument panel.
Starting System The electrically driven starter motor is mounted at the front of the engine.
When energised, the starter motor pinion engages a ring gear that is tted to the ywheel/
alternator pulley. When the master switch is on, turning the magneto key to the spring loaded
start position energises the starter solenoid located near the battery and this in turn energises
the starter motor.
If the engine is underprimed (most likely in cold weather with a cold engine) it will not re at all.
Additional priming will be necessary. When hot it may require none and may start with the throttle
just cracked open. Experience with the individual engine will enable the pilot to make the correct
judgment on this. Weak intermittent ring followed by puffs of black smoke from the exhausts
usually indicates overpriming or ooding. Excess fuel can be cleared from the combustion
chambers sufciently to allow the engine to start by applying the following procedure: set the
mixture control in ICO, fuel pump off, throttle full open, and engage the starter. When the engine
res retard the throttle and advance the mixture lever. When operating with a hot engine or in hot
conditions the fuel pump may be used to ensure smooth engine idling and operations.
Air Induction System The engine induction air normally enters through an intake chamber on
the underside of the engine cowl behind the propeller spinner. This intake has a replaceable