AD 2004-12-10
Unsafe Condition
Reports of propeller blades found at inspection with random areas of missing adhesive under the compression wrap, which exposed the steel tulip part of the blade, leading to potential corrosion-induced fatigue and blade separation.
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Required Actions
Remove propeller blades, part numbers R815505-3 and R815505-4, with serial numbers FR1699 through FR2625 and FR20010610 through FR20021010, from service and replace them with serviceable blades according to the specified schedule.
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Compliance Time
Within the compliance times specified in Table 1 of the AD, with some blades due by December 31, 2007.
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Affected Aircraft
Hamilton Sundstrand Corporation (formerly Hamilton Standard Division) Model 568F propellers with propeller blades, part numbers R815505-3 and R815505-4, serial numbers FR1699 through FR2625 and FR20010610 through FR20021010, installed on, but not limited to, Aerospatiale ATR42-400, ATR42-500, ATR72-212, and ATR72-500 airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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