sonaca aircraft S201 - Page 247

S201 AFM
7 - AIRPLANE AND SYSTEMS
DESCRIPTION
7.10 - FUEL SYSTEM
27/06/2019
SONAIR-S2-D-MAN-006
Page : 7-80
Rev. : A
7.10.5 FUEL FLOW METERS
The Sonaca 201 is equipped with two fuel flow meters to measure the amount
of fuel per hour pumped to the pressure regulator, and the amount returning
from the regulator to the tank.
The EMS collects measurements from both sensors and calculates the
difference, which is the exact engine fuel consumption. Refer to next section for
information on the use of this indication.
The following table allows troubleshooting an abnormal fuel flow indication:
Observed indication
Cause
Engine idle: approx. 3.5L/h
Full power: approx. 30L/h
Normal condition
Engine idle: approx. 3.5L/h
Full power: below 20L/h and engine
stalling
Fuel pump filter clogged
No indication at all or 0L/h
Both sensors failed
Connector behind instrument
disconnected
High fuel flow: between 80 and 130
L/h
Return fuel flow sensor failure
Negative fuel flow
Feed fuel flow sensor failure
WARNING
In case of abnormal fuel flow indication, finish flight by calculating fuel
consumption based on table in section 5.3.9 and bring aircraft to
maintenance.