AD NUMBER: 2007-12-03
SUBJECT: Airworthiness Directive 2007-12-03
SUMMARY: The FAA is adopting a new airworthiness
directive (AD) for certain Bombardier Model DHC-8-00 series
This AD requires revising the Limitations section of the
airplane flight manual to include procedures for pulling the 'HYD
PWR XFER' circuit breaker in the event of the loss of all
hydraulic fluid in the No. 1 or No. 2 hydraulic system.
This AD results from reports of fluid loss inthe No. 2 hydraulic
system, causing the power transfer unit to overspeed, increasing
the fluid flow within the No. 1 hydraulic system.
We are issuing this AD to prevent possible loss of both the No.1
and No. 2 hydraulic systems, resulting in the potential loss of
several functions essential for safe flight and landing of the