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GA-UL260-2B
For UL Engines
Inspections
Initial 50-Hour Inspection,
Annual (100-Hour) Inspections
In addition to the recommendations for the
Pre-Flight Inspection, the propeller and spinner
should be visually examined in detail after the first
50 hours (also annually and at 2000-Hour). This will
require the removal of the spinner for a detailed
examination.
Initial 50-Hour / 100-Hour or 12 calendar
month annual inspection:
1.
Remove Spinner Dome and examine it for
damage, and cracks. If necessary, replace the
spinner dome.
2.
Remove Clamping Bolts and dimensionally
check against one another. Any bolts that
exhibit stretching, corrosion or damage are
to be replaced.
3.
Remove the Forward Hub-Half and set aside.
4.
Remove each blade and inspect blade shanks
for any wear. A thorough visual inspection
is recommended together with a coin tap
inspection of each composite blade, including
the nickel erosion shield on the leading edge
(see AC 43-5).
d
l
No dents in the metal erosion shield should
be deeper than 1/8”.
d
l
No dents should puncture the metal
erosion shield.
d
l
No excessive wear on the leading edge.
(If further inspection is required, return
the blades to the factory or an approved
propeller shop for further examination.)
5.
Conditions requiring blade replacement:
d
l
Any hole in hollow blade shell (doesn’t
apply if a replacement metal erosion shield
will cover hole)
d
l
Any crack deeper than .025”
d
l
Any solid tip damage that can’t be trimmed
off completely
Tachometer Inspection
An improperly operating tachometer can lead to
propeller failure, excessive vibration or cause an
engine to exceed maximum RPM limits established
by manufacturers.
Proper tachometer operation and accuracy should
always be checked (using the manufacturer’s pro-
cedure, if available) during normal maintenance
intervals.
Pre-Flight Inspection
Perform this inspection before every flight.
Before each flight, carefully examine the propeller
blades and hub for looseness, any signs of damage,
excessive wear or any other condition that would
make the propeller unsafe to operate.
The pre-flight walk-around is an important element
of the process of airworthiness maintenance. It
should not be merely a superficial look, but a
studied review of the condition of everything that
might give trouble during the forthcoming flight.
1.
Carefully examine the propeller assembly for
looseness, any signs of damage, excessive
wear or any other condition that would make
the propeller unsafe to operate.
2.
Check the leading edge of blades for cracks
and debonding.
3.
Check the spinner and bulkhead for security,
missing screws, damage and cracks. Cracks
typically originate from the attachment
screws.
4.
Check for looseness of the bulkhead. This
could be an indication that the mounting
bolts are loose and need to be retightened.
5.
Note any indications in the logbook for
future reference to determine whether an
acceptable condition is getting worse.
