Wed, Dec 12, 2007
AD NUMBER: 2007-25-08
MANUFACTURER: Eurocopter France
SUBJECT: Airworthiness Directive 2007-25-08
SUMMARY: This amendment
supersedes an existing airworthiness directive (AD) for the
specified Eurocopter France (ECF) model helicopters.
That AD currently requires a onetime inspection for end play
inthe pitch control rod assembly double bearing (bearing) using the
tail rotor (T/R) hub control plate, and before further flight,
replacing the bearing if end play is present.
This amendment requireschecking the T/R gearbox (TGB) oil level
before the first flight of the day and maintaining the oil atthe
maximum level for certain helicopters. Also, this action requires,
during each required inspection or at certain specified intervals,
ensuring the oil is at the maximum level for certainother model
This action also requires inspecting the magnetic plug for chips
at specified intervals. Depending on the quantity of chips found,
this action requires either replacingthe TGB before further flight
or further inspecting for axial play in the T/R hub pitch change
control spider (spider).
If axial play is found in the spider, before further flight,
this AD requires replacing the bearing. This amendment is prompted
by the finding that metal chips were not detected on the magnetic
plug due to insufficient oil flow because the oil in the TGB was
being maintained atthe minimum level.
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