Cessna T188C - Page 301

MODEL 188 & T188 SERIES SERVICE MANUAL
15-37C. FUEL QUANTITY INDICATING SYSTEM OPERATIONAL TEST.
WARNING: REMOVE
ALL IGNITION SOURCES FROM THE AIRPLANE
AND VAPOR HAZARD AREA.
SOME TYPICAL EXAMPLES
OF IGNITION SOURCES
ARE STATIC ELECTRICITY,
ELECTRICALLY
POWERED
EQUIPMENT (TOOLS
OR ELECTRONIC
TEST EQUIPMENT
-
BOTH
INSTALLED ON THE AIRPLANE
AND GROUND SUPPORT EQUIPMENT),
SMOKING AND SPARKS FROM METAL TOOLS.
WARNING: OBSERVE ALL
STANDARD FUEL SYSTEM FIRE AND
SAFETY PRACTICES.
1. Disconnect
all electrical power from the airplane.
Attach maintenance warning tags to
the battery
connector and external power receptacle stating:
DO
NOT CONNECT ELECTRICAL POWER,
MAINTENANCE IN PROGRESS.
2. Electrically ground the airplane.
3. Level the airplane and drain all fuel from wing fuel tanks.
4. Gain access to each
fuel transmitter float arm and actuate the
arm through the transmitter's full range
of travel.
A. Ensure the transmitter float
arm moves freely and consistently through
this range of travel.
Replace any transmitter that does not move freely or consistently.
WARNING: USE EXTREME CAUTION
WHILE WORKING WITH ELECTRICAL COMPONENTS
OF THE
FUEL SYSTEM. THE POSSIBILITY OF ELECTRICAL SPARKS AROUND AN "EMPTY"
FUEL CELL CREATES A HAZARDOUS SITUATION.
B. While the transmitter float
arm is being actuated, apply airplane
battery electrical power as
required to ensure that the fuel quantity indicator follows the movement of the transmitter float
arm. If this does not occur, troubleshoot,
repair and/or replace components
as required until the
results are achieved
as stated.
NOTE: Stewart
Warner fuel quantity indicating systems
can be adjusted. Refer to this section
for
instructions for adjusting Stewart Warner fuel indicating systems.
Rochester fuel quantity indicating
system components are not adjustable,
only component
replacement or standard
electrical wiring system maintenance
practices are permitted.
5. With the fuel selector valve in the "OFF" position, add unusable fuel to each fuel tank.
6. Apply electrical power as required to verify the fuel quantity indicator indicates "EMPTY".
A. If "EMPTY" is not indicated, adjust,
troubleshoot, repair and/or replace fuel indicating
components
as required until the "EMPTY" indication is achieved.
NOTE: Stewart
Warner fuel quantity indicating systems
can be adjusted. Refer to this section
for
instructions for adjusting Stewart Warner fuel indicating systems.
Rochester fuel quantity indicating
system components are not adjustable,
only component
replacement or standard electrical wiring system maintenance practices are permitted.
Temporary Revision Number 4
7 October 2002
© 2002 Cessna Aircraft Company
15-12C