NTSB Issues Recommendations On GE 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 Unlimited -- Recent Daily Episodes

Episode Date

Monday

Tuesday

Wednesday

Thursday

Friday

Airborne On ANN

Airborne 03.02.15

Airborne 03.03.15

Airborne 02.25.15

Airborne 02.26.15

Airborne 02.27.15

Airborne Hi-Def On YouTube

Airborne 03.02.15

Airborne 03.03.15

Airborne 02.25.15

Airborne 02.26.15

Airborne 02.27.15

Thu, Mar 06, 2008

NTSB Issues Recommendations On GE CF34-3B1 Turbofans

Cites Two Recent Blade Failures On CRJ200s

The National Transportation Safety Board issued recommendations Wednesday to the Federal Aviation Administration to address a safety concern raised by two engine failures on Bombardier Canadair Regional Jet CRJ-200 aircraft. The Board states a flaw during the manufacturing process for fan blades led to the two engine failures, and the Board wants procedures set up to remove these blades before another incident occurs. A companion recommendation was sent to the Canadian government.

In both instances -- a July 27, 2006 engine failure on an Air Nostrum CRJ shortly after takeoff from Barcelona, Spain, and a May 24, 2007 engine failure on an Atlantic Southeast airlines CRJ while in cruise flight from Syracuse to Atlanta -- a fan blade on a General Electric CF34-3B1 turbofan engine fractured, causing a loud bang, severe vibration and in one case an engine fire. Both flight crews declared emergencies and landed safely with no injuries.

Examination of the blades showed that they failed due to a material defect introduced during the manufacturing process, according to NTSB investigators. The fan blades were manufactured by Teleflex Aerospace Manufacturing Group, located in Mexico. Teleflex has manufactured more than 28,000 of these blades.

"We are issuing this recommendation because we consider the safety risk associated with this condition to be unacceptably high," NTSB Chairman Mark V. Rosenker said.

The ASA fan blade failed after 4,717 cycles and 5,845 hours, which is very early in a blade's service life, the Board said.

The Board issued six recommendations to the FAA, including that it require GE Aviation to define a reasonable maximum time frame below 4,717 cycles since new for these Teleflex fan blades and require that the blades be removed from service before that limit is exceeded, to require GE to include additional testing in the manufacturing process for those blades, and to require GE to make modifications in its CF34-1/-3 engine design to ensure that high engine vibrations (such as can happen when a fan blade fractures) will not cause the engine to catch fire.

The Board also issued a recommendation to Transport Canada, that country's equivalent to the Department of Transportation, to require Bombardier to redesign the retention feature of the CRJ 100/-200 engine throttle gearbox to ensure that it can withstand the loads generated by a fan blade separation or similar event.

FMI: Read The Recommendations Here And Here (.pdf)

Advertisement

More News

Airborne 03.02.15: HeliExpo, UAL Pilot Warning, WWII Flyover, RAF Aids In WV

Also: Blue Angels, Fuel Taxes, Twirly Birds, Bell 429WG, Delta Selects GoGo It’s common for airlines to issue numerous safety notice to flight crews, but United Airlines issu>[...]

EASA Certifies Continental MotorsÂ’ CD-155 Engine For DA42 TDI

Now Approved For European Installation, FAA Certification Pending EASA has certified Continental Motors Group CD-155 hp Jet-A diesel engine option for installation in the Diamond t>[...]

Counting Down! ANN's Infamous April 1st Edition's Just Around The Corner!

Get Your Wacky Ideas In NOW! ANN E-I-C Note: Folks... we gotta warn you... based on all the nonsense we've had to endure in 2014-2015 (which we are duty-bound to lampoon), this may>[...]

ANN's Daily Aero-Linx (03.03.15)

How Planes Work Need a great illustration of an airplane, clearly labeled, so you can explain -- again -- why planes stay up in the air? This is a good illustration; maybe they'll >[...]

ANN's Daily Aero-Term (03.03.15): Have Numbers

Used by pilots to inform ATC that they have received runway, wind, and altimeter information only.>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2015 Web Development & Design by Pauli Systems, LC