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% Maintenance Practices % 1. General
% The maintenance practices in this Section tell you how to replace a fuel tank probe and a fuel tank % sensor.
% Refer to Section 31-11 for data on removing/installing a fuel quantity indicator.
% Obey the safety precautions for fuel at all times.
% WARNING: DO NOT GET FUEL ON YOU. FUEL CAN CAUSE SKIN DISEASE.
% WARNING: DO NOT ALLOW FIRE NEAR FUEL. FUEL BURNS AND CAN CAUSE % INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
% WARNING: DO NOT BREATH FUEL VAPOR. FUEL VAPOR CAN MAKE YOU ILL.
% 2. Remove/Install a 'Low Fuel' Sensor
% Each tank has a low fuel sensor.
% Obey the safety precautions for fuel at all times.
% A. Remove a 'Low Fuel' Sensor % %
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Detail Steps/Work Items Key Items/References
(1) Remove the wing that has the low fuel sensor that you will remove. Refer to Section 57-10.
(2) Remove the access panel from the root rib of the wing: S Remove the 11 nuts and washers from the studs. S Pull the access panel off the studs and clear of the airplane.
(3) Disconnect the electrical cables for the low fuel sensor. At the in-line connector.
(4) Remove the low fuel sensor from the tank.
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% B. Install a 'Low Fuel' Sensor %
Detail Steps/Work Items Key Items/References
(1) Install the low fuel sensor in the fuel tank: S Apply sealant to the thread of the low fuel sensor. S Move the low fuel sensor into position in the fuel tank mount. S Screw the low fuel sensor fully home into the mount. S Tighten the low fuel sensor. Use Loctite 243 or 'seal-lube' or 'fuel-lube'. The arrow must point down.
(2) Connect the electrical cables to the low fuel switch. At the in-line connector.
(3) Install the access panel at the wing root rib: S Put the access panel into position on the studs. S Install the 11 washers and nuts. S Tighten the nuts.
(4) Install the wing, but do not refuel the airplane. Refer to Section 57-10.
(5) Do a test for the correct operation of the low fuel sensor. Right tank: Make sure that it switches off the fuel transfer pump when the fuel level is low. Left tank: Make sure that it switches on the LOW FUEL caution light when the fuel level is at 3 US gal (+2/-1 US gal).
(6) Refuel the airplane. Refer to Section 12-10.
(7) Do a check for leaks.
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Fuel System
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% 3. Remove/Install the 'High Fuel' Sensor
% Only the left tank has a high fuel sensor. % Obey the safety precautions for fuel at all times. % A. Remove the 'High Fuel' Sensor
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