Flight 1549 Investigation Sheds Light On CFM56 Airworthiness Directive | 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

Airborne Unlimited-
Monday

Airborne-Unmanned w/AUVSI-
Tuesday

Airborne Unlimited-
Wednesday

AMA Drone Report-
Thursday

Airborne Unlimited-
Friday

Airborne On ANN

Airborne 05.21.18

Airborne-UnManned 05.22.18

Airborne 05.23.18

AMA Drone Report 05.24.18

Airborne 05.18.18

Airborne-YouTube

Airborne 05.21.18

Airborne-UnManned 05.22.18

Airborne 05.23.18

AMA Drone Report 05.24.18

Airborne 05.18.18

Wed, Jan 21, 2009

Flight 1549 Investigation Sheds Light On CFM56 Airworthiness Directive

Compressor Stall Problem Reported With A320 Engines

The National Transportation Safety Board's ongoing investigation into last week's downing of US Airways Flight 1549 has centered on the aircraft's two CFM International turbofans, which appear to have been knocked out simultaneously after an encounter with a large flock of birds. The NTSB is exploring all possible causes for the engines to lose power, however... and that investigation has revealed some interesting tangents.

As ANN reported Tuesday, passengers who flew on the same plane on January 13 -- two days before Flight 1549 ditched in New York's Hudson River -- reported a loud bang and temporary loss of power in the plane's number two (right) on their flight, which was attributed to a compressor stall. The NTSB has since confirmed those reports.

Now, Newsday reports that two weeks before that incident, the FAA issued an airworthiness directive on CFM56-5B engines... the same type that were on N106US, the A320 that ditched in the Hudson. That AD was related to, you guessed it, compressor stall incidents; specifically, the AD calls for more stringent inspections of engines which exceed upper operating temperature ranges when the throttles are rolled back from takeoff power.

Earlier this month -- before Flight 1549 -- General Electric spokesman Rick Kennedy told The Business Courier of Cincinnati there had been 10 reported cases of compressor stalls on A320 family aircraft since April 2008, each lasting "a second or two." In one of those cases, both engines on an Air France A320 suffered apparent compressor stalls shortly after takeoff.

CFM is a joint venture of GE Aviation and French consortium Snecma.

At this time, these revelations appear to have little to do with what felled Flight 1549 on January 15. Both pilots onboard the airliner say they saw a large flock of birds immediately before the engines flamed out, and were unable to maneuver to avoid it. Neither have reported any prior engine anomalies.

That seems to follow with early results of the NTSB's investigation. "We have not found any indications of anomalies or malfunctions with the aircraft from the time it left the gate in LaGuardia... to the point at which the pilots reported a bird strike and a loss of engine power," said Board spokesman Peter Knudson on Tuesday.

Furthermore, analysis of the aircraft's right engine has revealed broken turbine vanes, consistent with impact with foreign matter... like with one or more large birds. Crews are still working to recover the plane's left engine from the floor of the Hudson River.

Newsday adds that salvage crews were seen Tuesday circling several areas of the A320's nose section with greasepens, "apparently to indicate possible bird strikes."

(Image by Gregory Lam)

FMI: www.faa.gov, www.ntsb.gov

Advertisement

More News

Airborne 05.21.18: Bally Bomber At OSH18!, Belite Chipper, CH-53 Deliveries

Also: NATS-Aireon, H135 For US Navy, EmPower STC, Spidertracks-Olympic Aero Services Oshkosh 2018 is ramping up to be an outstanding addition to an aviator’s MUST-SEE list...>[...]

Airborne-Unmanned 05.22.18: Aurora ACUS, Horsefly Delivers, K2 LEO UAS

Also: Aero-TV: Textron's X5-55, InfraDrone App, NASA's Mars Helicopter, Gremlins on Track This month, Aurora’s Autonomous Aerial Cargo Utility System (AACUS) successfully del>[...]

AMA Drone Report 05.17.18: AMA Expo West Upgrades, UAS IPP, Amazon Snubbed

Also: Drones v Flaming Kites, Sherrif Drones, ALPA Is Watching..., Wichita Aviation Pathway After a number of years in Ontario, California; the highly anticipated 2018 rendition of>[...]

ANNouncement: Now Accepting Applications For Oshkosh 2018 Stringers!!!

An Amazing Experience Awaits The Chosen Few... E-I-C Note: There's very little we can say yet, but there is a reason why this may be THE year to throw in with ANN to cover the extr>[...]

It's On--Again! EAA/ANN Announce 2018 AirVenture Innovation Preview!

Stunningly Successful Innovation Program Draws Hundreds of Thousands of Eyeballs to ‘All Things AirVenture’ E-I-C Note: We're tremendously excited to work with EAA agai>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2018 Web Development & Design by Pauli Systems, LC