AD NUMBER: 2004-10-07
MANUFACTURER: Bell
SUBJECT: Airworthiness Directive 2004-10-07
SUMMARY: This amendment supersedes an existing
airworthiness directive (AD) for Bell Helicopter Textron Canada
(BHTC) Model 407 helicopters which requires a one-time replacement
of certain oil cooler blower bearings. Also, the existing AD
requires adding a limitation and caution to the rotorcraft flight
manual (RFM) and inspecting, replacing, and lubricating certain
bearings at specified intervals. This amendment adds certain
segmented drive shaft bearings to the applicability and requires
modifying the oil cooler blower inlet ducts and airflow shields and
replacing certain bearings. Thereafter, this amendment requires