Modified CRJ Flap AD Proposed

The Federal Aviation Administration is proposing to add to an airworthiness directive (AD) for flaps on Bombardier CRJ100200 aircraft, and is seeking comments by Tuesday, Jan. 20. Published in January 2008, the original AD sought to remedy problems with flaps sticking during cold weather operations by mandating drive shaft pressure tests and flap actuator torque tests. Since the agency issued the AD, FAA has “received a report that it was not effective in reducing the number of flap failures,” according to the agency. The modified AD will add several required actions, including checking and repairing flap components after failure, placing placards in the cockpit to identify flap limitations and revising the aircraft flight manual regarding maximum speeds with flaps extended.
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That\'s been a long time in the making. But the freezing temp is most likely not the problem or the only problem. I think it is a weak system with even weaker asymmetry protection - I don\'t think the position sensing hardware performs as expected all the time. Case in point - we hit thunderstorm turbulence at cruise speed shortly after take-off - the pilot went left the pilot went right - decelerated and leveled out. During the process the inboard flap on my side of the aircraft crept out about 1 degree or less. The cockpit could not command the flap(s) back in and the resultant drag required us to return to an alternate airport for a no-flap landing.

Posted by Marty on Saturday, January 17, 2009 @ 09:30 PM

Modified CRJ Flap AD Proposed

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