User manual

Part B Section 12.72
09 PRIMING SWITCHES
The priming pumps are located on the rear of bulkhead 4 in the pylon and are switched
from the Yoke. The Priming Pumps are protected by circuit breaker under 'Starter Control'
on the Co-Pilot's Switch Panel.
10 STARTER SWITCHES
The two starter switches are located on the yoke. The starter motor will immediately
engage when the switch is operated. They are protected by a clutch should the engine
backfire or hydraulicing occur.
The starter circuit also supplies boosted voltage to the front set of plugs on both engines.
The engines are to be "pulled through" on the starter prior to starting by counting 12
blades prior to using the primer and switching on the magnetos.
Refer also to starter engaged warning Lights under Electrical System in this section
11 FEATHERING AND UN FEATHERING
Feathering is achieved by the use of a powerful electric hydraulic pump mounted below
the main oil tank. The pump is supplied with oil from a sump in the bottom of the oil tank,
and this sump retains its supply of oil even if the main tank empties.
Sufficient oil is retained to ensure that feathering may be accomplished in the event that
the main supply is lost. The pump is controlled from the feather buttons on the Throttle
Quadrant. The control circuit is protected by a circuit breaker, but the pumps are
connected directly to the batteries, and are supplied through the Battery Master Switch on
the Pilots Main Panel.
12 COWL FLAPS
The cowl flaps are electrically controlled from the yoke. They should be open for starting
and then controlled as necessary for correct temperature control of the engines. E.g.
closed for descents.
Each cowl flap motor has its own circuit breaker on the Co Pilot's Switch Panel.
The are problems maintaining the Cowl Flap motors and when a motor is not functioning
or is absent the corresponding Cowl Flaps will be lock- wired in a partially open position.
Stichting Catalina PH-PBY Rev No: 00
18 May, 2004 Page: 5