Fuel Hose Inspection - Lycoming TEO-540-C1A Maintenance Manual

TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual

2. Fuel Hose Inspection

WARNING DO NOT SMOKE OR HAVE AN OPEN FIRE/FLAME OR USE ANY
DEVICE THAT CAN MAKE SPARKS DURING THIS INSPECTION.
FLAMES OR SPARKS CAN CAUSE FUEL IGNITION WHICH CAN CAUSE
SERIOUS BURNS, INJURY, OR DEATH.
CAUTION TO ENSURE CORRECT ENGINE OPERATION AND FLIGHT SAFETY,
THERE MUST NOT BE ANY FUEL LEAK AND ALL FUEL HOSES MUST
BE SECURED WITH SERVICEABLE CUSHIONED CLAMPS. IDENTIFY
AND CORRECT THE CAUSE OF ANY FUEL LEAK.
NOTICE: This fuel hose inspection is to be done during every visual inspection, after every 100
hours of engine operation, and any time fuel hoses or clamps are serviced, removed, or
replaced. Copy and record findings in the Fuel System Inspection Checklist in this
chapter.
A. There are six fuel hoses (or lines) on this engine (Figure 3). For reference, identify each fuel
hose by number.
B. Examine each fuel hose for damage, leaks, dents, pits, nicks, kinks, stains (from fuel leaks),
cracks, brittleness, nearby heat sources, chafing, looseness, and sharp bends. Refer to Figure
4 which shows the minimum acceptable bend radius for a bend in the fuel hose. Replace (do
not try to repair) a worn, damaged, chafed, brittle, kinked, or loose fuel hose. (A loose fuel
hose could have been subjected to vibrational forces and be weakened. Cracks can develop at
kinks in fuel hoses.)
CAUTION
C. Make sure all fuel hoses are held in place securely using serviceable cushioned clamps to
prevent fuel hose movement due to vibration.
(1) Make sure each clamp securely supports the fuel hose to prevent fuel hose movement due
to vibration, friction, or motion frequencies. Do NOT use plastic tie straps as clamps.
(2) Examine the cushion on clamps for deterioration. If cushions are deteriorated or missing,
replace the clamp with a new clamp with the cushion intact. The fuel hose could need to
be replaced per guidelines in Table 1.
(3) If a fuel hose had been in service and clamps were not installed, replace the fuel hose
with a new fuel hose (as a precaution since vibration can cause cracks in the fuel
hoses.)
(4) Make sure the clamps are securely attached. If the clamps are loose, replace the fuel hose.
© 2018 Avco Corporation. All Rights Reserved
November 2018
TO SUPPORT FUEL SYSTEM PERFORMANCE, ALL WORN,
DAMAGED, CHAFED, BRITTLE, KINKED, OR LOOSE FUEL HOSES
MUST BE REPLACED - NOT REPAIRED.
MAKE SURE EACH FUEL HOSE IS INSTALLED WITH SERVICEABLE
CUSHIONED CLAMPS TO KEEP THE FUEL HOSES SECURELY IN
PLACE TO PREVENT FUEL HOSE DAMAGE DUE TO VIBRATION
AND FRICTION AGAINST OTHER PARTS OF THE ENGINE.
VIBRATION, RUBBING, AND/OR KINKS IN THE FUEL HOSES CAN
CAUSE CRACKS IN THE FUEL HOSES. AS A RESULT, THE FUEL
HOSES CAN EVENTUALLY BREAK, LEAK FUEL ON THE ENGINE,
AND CAUSE A FIRE OR ENGINE STOPPAGE.
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