Globally, there is some hope that emerging markets in Africa, Asia and the Middle East could find use for some displaced CRJs. But those opportunities will pale in comparison to the regional jet's heyday during the mid-2000s in North America.
CRJs have several current airworthiness directives (AD) calling for part or component swaps. Transport Canada (TC) AD CF-2013-12, issued in April, calls for inspection and eventual replacement of CRJ100/200/440 pilot-side rudder pedal tubes. Deadlines vary based on the aircraft's service history; those with 37,000 or more cycles require swaps within 300 cycles.
A February directive (CF-2013-03) orders initial replacement of CRJ700/900/1000s' left- and right-side elevator bell-crank supports at designated flight-hour limits depending on the aircraft time in service. The process must be repeated every 20,000 flight hours following the initial swap.
In January 2012, TC issued CF 2012-06, requiring CRJ operators to install new sensing elements in the main landing-gear wheel well and the over-wing area, protective blankets on the upper surface of the wing box and fuel tubes, and protective shields on the rudder quadrant support-beam in the aft equipment compartment. The fixes, which help ensure high-pressure-duct bleed air leaks are detected quickly, must be done by Feb. 9, 2014, or within 6,600 flight hours, whichever comes first.
Tap the icon in the digital AW&ST MRO edition for break-downs of CRJ MRO spending by expense category, or go to AviationWeek.com/crjmro
Recent Notable CRJ Airworthiness Directives
|Transport Canada/AD#||Issue||Effective Date||Compliance|
|CF-2013-12||Cracked pilot rudder pedals caused by fatigue cracks forming when parking brakes are applied.||5/30/2013||Varies, based on airframe service life.|
|CF-2013-03||Replace elevator bell-crank supports to reduce chances of erratic elevator movement.||2/19/2013||Varies, based on airframe service life.|
|CF-2012-06||Bleed-air leak detection.||2/19/2013||24 months or 6,600 hr.|
|Source: Transport Canada|