STEMME S12 User Manual

DOCUMENT NUMBER:
L500-912.820 ISSUE JUL 20, 2016
AMENDMENT: 00
DATE: 
CHAPTERPAGE 317
MAINTENANCE MANUAL STEMME S12
3.4.6.4 ELECTRICAL LAYOUT AND OPERATION OF THE FUEL PUMPS
For normal operation, the auxiliary fuel pump is switched o, and only the main pump is operat-
ing. The main pump is electrically supplied by the internal generator of the engine, or the engine
battery respectively.
The auxiliary fuel pump can be added if necessary, for example during take-o and landing. It is
supplied by the external alternator, or the main battery respectively:
•
The right wing tank pump operates with the fuel selector switch in position ”RIGHT” or
”BOTH” tanks and the oat switch in the feeder tank switching the pumps “ON”.
• The left wing tank pump works with the fuel selector switch in position ”LEFT” or ”BOTH”
tanks, plus the oat switch in the feeder tank switching the pumps “ON”.
• The main pump works when the engine electrical system is powered.
•
The auxiliary fuel pump works when the main electrical system is powered and the auxiliary
fuel pump switch is selected “ON”.

STEMME S12 Specifications

General

Brand	STEMME
Model	S12
Category	Aircrafts
Language	English