FAA Issues Emergency AD On CF34-3B1 Turbofans | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

** Airborne 11.26.14 ** HD iPad-Friendly -- Airborne 11.26.14 **
** Airborne 11.24.14 ** HD iPad-Friendly -- Airborne 11.24.14 **
** Airborne 11.21.14 ** HD iPad-Friendly -- Airborne 11.21.14 **

Wed, Feb 21, 2007

FAA Issues Emergency AD On CF34-3B1 Turbofans

Says Engine Marking Procedure Led To Fan Disk Failure

Less than one month after a Mesa Airlines regional airliner suffered an inflight uncontained fan disk failure in one of its engines, the FAA has issued an emergency Airworthiness Directive requiring operators of the type to perform inspections on their engines.

As Aero-News reported, the CRJ-200 experienced failure of its number one engine January 25, approximately 70 nm from Denver International Airport, while climbing through 24,000 feet. The failure took out the forward engine cowling, but the aircraft was otherwise unscathed. The flight returned uneventfully to Denver and none of the 55 persons aboard was injured.

In its Airworthiness Directive, the FAA states an inspection of the GE CF34-3B1 engine showed the front section of the engine failed, resulting in the fan, forward cowlings, and fan reverser departing from the engine. A subsequent inspection of the recovered segments of the fan disk, found an electrical arc-out defect at the fracture origin site.

The FAA adds the fan disk was marked using the electro-chemical etchmarking (ECM) procedure during engine assembly. If the ECM procedure is performed incorrectly, an arc-out defect can occur. This arc-out defect, caused during part marking, resulted in the uncontained failure.

Operators of affected aircraft may refer to GE Alert Service Bulletin (ASB) No. CF34-BJ S/B 72-A0213, dated February 15, 2007, and GE ASB No. CF34-AL S/B 72-A0232, dated February 15, 2007 for procedures for visual and tactile inspection of certain areas of certain serial number (SN) fan disks, to determine if those fan disks are similarly affected.

FMI: www.faa.gov/regulations_policies/airworthiness_directives/

Advertisement

More News

Airborne 11.26.14: Island Air Scrooges Pilots, DC's NextGen, EAA On Stadium Flts

Also: F35C Pilots Build Time, A Sea Of Yellow Cubs, Lycoming's Dual Fuel Husky, CAP's Gold Medal, Boeing SC's First 787-9 This report could be called the story of the Grinch who st>[...]

AeroSports Update: What Is An LSA, And How Do I Know?

The Term Light Sport Aircraft (LSA) Is A Description Of An Aircraft, Not A Specific Type Of Aircraft Airworthiness Certification Anyone that holds a sport pilot certificate, or any>[...]

Airborne 11.26.14: Island Air Scrooges Pilots, DC's NextGen, EAA On Stadium Flts

Also: F35C Pilots Build Time, A Sea Of Yellow Cubs, Lycoming's Dual Fuel Husky, CAP's Gold Medal, Boeing SC's First 787-9 This report could be called the story of the Grinch who st>[...]

Aero-TV: SyberJet Update -- A Whole New Program

Fast and Agile -- The Latest Updates To The SyberJet Program Show Promise While at NBAA2014, ANN CEO and Editor-In-Chief, Jim Campbell, visited with Mark Fairchild, the general man>[...]

ANN's Daily Aero-Linx (11.27.14)

International Civil Aviation Organization The ICAO is a UN Specialized Agency,and a global forum for civil aviation.>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2014 Web Development & Design by Pauli Systems, LC