US FAA officials are proposing that operators of 684 Bombardier
CRJ100/200 jets in the US
provide simulator training covering reduced- or zero-flap landings for pilots
and perform several additional maintenance actions within two years as part of a
new comprehensive Airworthiness Directive (AD) related to the aircraft’s flap
system failures in cold weather.
Included are steps previously mandated in a mid-August AD on
the flaps, calling on operators to update flight manuals and operations and
training procedures to deal with potential flap failures and to clean and
lubricate the flexible shafts that drive the flaps as well as perform a
detailed inspection of the actuator connector sealant bead for signs of damage
The ADs are aimed at stemming a
large number of stuck flap incidents that have been linked to cold weather
operations with the Canadian-made twinjets before the next winter season sets
Under the proposed rule, pilots must receive initial
simulator training for reduced- or zero-flap landings by 30 November 2008, and
must receive recurrent training at least yearly after that.
Additional mechanical tasks include performing a pressure
test of the flexible drive shaft in the flap mechanism to check for leaks
within two years or 4,000 flight hours after the AD is approved. Operators
within two years of the AD will also have to perform a low-temperature torque
test of the flap actuators.