AIRCRAFT
DA 42 NG AMM
Fuel
Doc # 7.02.15
Rev. 4
28-20-00
Page 7
15 Mar 2018
3. Fuel Distribution System Components
A. Flexible Hoses
The fuel system uses synthetic flexible hoses. The flexible hoses in the engine bay have integral
fire-protection sleeves.
You must only use approved flexible hoses in the fuel system which have been pressure tested.
B. Fuel Transfer/Shut-Off Valves
Figure 4 shows a fuel transfer/shut-off valve installation. A fuel transfer/shut-off valve is located in
each engine nacelle, aft of the engine firewall. A long shaft connects the valve to a drive unit
located under the cockpit floor. A lever connects the drive unit to a fuel selector lever. The selector
levers for both fuel transfer/shut-off valves are mounted in the cockpit center console. Each lever
has the positions:
(1) ON
If you set the engine fuel selector levers to the ON position both engines will be take fuel from
their related fuel tanks. For example, the left engine will take fuel from the left main fuel tank and
the right engine will take fuel from the right main fuel tank.
(2) CROSSFEED
If you set an engine fuel selector lever to the CROSSFEED position the engine will take fuel
from the opposite main fuel tank. For example, if you set the left fuel selector lever to
CROSSFEED and the right fuel control lever to ON then both engines will take fuel from the
right main fuel tank. If you set the right fuel selector lever to CROSSFEED and the left selector
lever to ON then both engines will take fuel from the left main fuel tank.
(3) SHUT-OFF
If you set an engine fuel selector to the SHUT-OFF position then the fuel supply to that engine
will be shut-off and the engine will not run. Each lever has a safety guard located on the lever
console to prevent accidental selection of the SHUT-OFF position. You must turn the safety
guard before you can move the related fuel selector lever to the SHUT-OFF position. The other
engine fuel selector lever is independent and will operate based on the selected position.
For example, if you set the left fuel selector lever to SHUT-OFF and the right fuel selector lever
to ON the left engine takes no fuel and the right engine takes fuel from the right main fuel tank.
If the right selector lever is moved to CROSSFEED then the right engine will take fuel from the
left main fuel tank.
Summary of Contents for DA 42 NG
Page 933: ...AIRCRAFT DA 42 NG AMM Fuel Doc 7 02 15 Rev 4 28 TITLE Page 1 15 Mar 2018 CHAPTER 28 FUEL ...
Page 1459: ...AIRCRAFT DA 42 NG AMM Lights Doc 7 02 15 Rev 4 33 TITLE Page 1 15 Mar 2018 CHAPTER 33 LIGHTS ...
Page 1711: ...AIRCRAFT DA 42 NG AMM Doors Doc 7 02 15 Rev 4 52 TITLE Page 1 15 Mar 2018 CHAPTER 52 DOORS ...
Page 1853: ...AIRCRAFT DA 42 NG AMM Wings Doc 7 02 15 Rev 4 57 TITLE Page 1 15 Mar 2018 CHAPTER 57 WINGS ...
Page 2071: ...AIRCRAFT DA 42 NG AMM Engine Doc 7 02 15 Rev 4 72 TITLE Page 1 15 Mar 2018 CHAPTER 72 ENGINE ...
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