User manual

Section 12.28 Part B
13 MIXTURE CONTROL SETTINGS
The mixture control handles are between the fuel cocks, on the bulkhead, behind the
pilots. Be sure that at each position the handle detent is correctly engaged. This will
ensure reliable performance and fuel economy. Intermediate positions can be use if
necessary as for example in using mixture to help control Cylinder Head Temperature.
The mixture settings are: 1 Full rich
2 Auto Rich
3 Auto Lean
4 Idle Cut-Off
14 FIREWALL SHUT OFF VALVES
These valves, one for each engine, are actuated by firmly pulling the yellow 'T' handle next
to the fuel cocks. In the event of an engine fire they will help prevent spread of the fire to
the wings. The use of the valves is explained in Section 4 (pg429)
Via a cable and pulley system the flow of fuel and oil through the firewall to the engine is
stopped and on the starboard engine the hydraulic fluid is also stopped.
Caution: To pull the ‘T' handles requires considerable force. The non-flying pilot may need
to turn out of his seat to be able to pull hard enough to break the lock wires and
pull the cables.
Note: The Firewall Shut Off Valves can only be reset on the ground. Once the Firewall
Shut Off 'T' handle is pulled, the cut in fuel, oil and hydraulic fluid flow is irrevocable.
Rev No: 00 Stichting Catalina PH-PBY
Page: 4 18 May, 2004