4 FUEL SYSTEM
4.1 Requirements
The fuel sys tem has to be de signed for all types of fuel as given in the op er at ing man ual and there
should also be a good chem i cal re sis tance to clean ing ma te ri als. An haz ard ous op er at ing con di -
tion may oc cur when fuel tanks are used which are made of com pos ite ma te rial and ob serve the
sur face seal ing and also the ad he sion. New lead-free fu els con tain an al co holic dis sol vent. Both a
fuel fil ter and a wa ter trap should be pro vided at a suit able lo ca tion. No par ti cles larger than 7-10
µm must be al lowed to pass through the fil ter.
De pending on the de sign of the fuel sys tem and the am bi ent tem per a ture, va por locks may oc cur.
These cre ate a se vere power loss. In some air craft it may be pos si ble that the pi lot may not ob -
serve any in di ca tion of this dur ing taxi ing and the take-off run. The op er at ing man ual of the air
-
craft must con tain an in di ca tion of this fact. The prob a bil ity of va por locks is min i mized if the
in struc tions on the con nec tion di a gram are fol lowed. The elec tri cal fuel pump must be placed at
the cool est po si tion in the sys tem. In or der to re duce the fire haz ard, only min i mum quan tity of
fuel is to be con tained for ward of the firewall.
4
Prepared by: J. B. Meyer Replaces edition from: 10.03.86 Page: 4-1
Checked by: Edition: 01.03.1999 Reg. Number:
Installation Manual
L 1700, L2000 and L 2400 Series
V2
P2
V1
S1
F1
F2
V3
P2
F5
T1
T2
W1
Fig. 4-1 Fuel System Diagram, Engines with Carburetors
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