Van's Aircraft RV 12iS, Maintenance Manual

Page: 151 / 222

Rev: 2 Date: 11/15/18
13-7
D
RAINING THE FUEL SYSTEM
Special Tools 1/8”NPT x 3/8” hose barb
12” x 3/8” I.D. fuel hose
Fuel Container
Protective Gloves
Expendable Pipe Thread Sealant
Replaceable None
Service Rating Line
Minimum Certification Owner
and
SPC, LSA-RM or A&P
Additional References KAI
•
NOTE:
I
F THERE IS A FAIR AMOUNT OF FUEL IN THE TANK
,
REDUCE THE DRAIN TIME BY
FIRST SIPHONING OUT AS MUCH AS POSSIBLE
. A
SMALL WEIGHT SECURELY ATTACHED TO
THE END OF A FLEXIBLE SIPHON HOSE WORKS WELL FOR REACHING THE TANK
'
S
BOTTOM
.
1. Move the fuel selector control to the ‘OFF’ position.
2. Remove the access cover plate located below the gascolator (ULS) or fuel drain
assy. (iS).
3. Place a container beneath the gascolator (ULS) or fuel drain assy. (iS) with
sufficient capacity for the fuel in the fuel tank.
4. Remove the CAV-110 drain valve from the bottom of the gascolator (ULS) or fuel
drain assembly (iS).
5. Install the hose barb (with hose attached) in the opening where the fuel drain was
removed.
6. Move the fuel selector control to the ‘ON’ position.
7. Remove the fuel cap from the fuel neck.
■ CAUTION: T
URN OFF THE ELECTRIC FUEL PUMP IMMEDIATELY WHEN A CHANGE IN
SOUND IS HEARD
, (
THE LOUDER
/
HIGHER FREQUENCY SOUND INDICATES THE FUEL PUMP
IS NO LONGER PUMPING FUEL
) DO NOT ALLOW THE FUEL PUMP TO OPERATE
WITHOUT FUEL OR PERMANENT DAMAGE MAY OCCUR.
8. ULS Only - Turn on the master switch and operate the ES 40135 Electric Fuel
Pump until the fuel pump stops pumping fuel.
9. iS Only – Allow the fuel to drain via gravity.
10. Once fuel is fully drained, move the fuel selector control to the ‘OFF’ position.
11. Reinstall the fuel filler cap in the fuel neck.
12. To aid in clearing the fuel lines use low pressure (5-10 PSI max) air applied to
■ W
ARNING
: E
XPECT SOME FUEL DRAINAGE TO OCCUR AS THE DRAIN VALVE IS REMOVED
.
U
SE PROTECTIVE GLOVES AND HAVE SHOP RAGS CLOSE BY
.