AD NUMBER: 2005-20-21
MANUFACTURER: Fokker SUBJECT: Airworthiness Directive 2005-20-21 SUMMARY: The FAA is adopting a new airworthiness
directive (AD) for certain Fokker Model F27 Mark 050 airplanes.
This AD requires repetitive visual checks for oil leaks of both
engines between the spinner and the engine cowling, and directly
behind the heated intake lip of the engine; repetitive inspections
for oil leaks at the feathering pump on both engines; and
corrective actions if necessary. This AD results from reports of
oil leakage at the engine feathering pump. We are issuing this AD
to prevent oil loss from the feathering pump, which could cause the
engine to shutdown in flight.