Piper SEMINOLE 2013 Pilot Operating Handbook page 290

SECTION 8
HAND / SERV / MAINT
8.23 fUEL SySTEM (continued)
(d) Draining Fuel Strainers, Sumps and Lines
The aircraft is equipped with single point drains (Figure 8-3)
which should be drained before the first flight of the day and after
refueling, to check for fuel contamination. If contamination is found,
fuel should be drained until the contamination stops. If contamination
persists after draining fuel for a minute, contact a mechanic to check
the fuel system.
Each half of the fuel system can be drained from a single point
which is located just forward of the entrance step. Fuel selectors
should be in the ON position during draining. The fuel drained
should be collected in a transparent container and examined for
contamination.
When draining fuel, be sure that no fire hazard
exists before starting the engines.
REPORT: VB-2307
8-16
cAUTION
fUEL DRAINS
Figure 8-3
PA-44-180, SEMINOLE
ISSUED: June 5, 2013