Editing General Electric CF6 (section)

== Accidents and incidents ==

In [[1973 in aviation|1973]], a CF6-6 fan assembly disintegrated, resulting in the loss of [[cabin pressurization]] of [[National Airlines Flight 27]] over [[New Mexico]], United States.<ref>{{cite web |url= http://lessonslearned.faa.gov/ll_main.cfm?TabID=1&LLID=19 |title= National Airlines Flight 27, McDonnell Douglas DC-10-10, N60NA |publisher= Federal Aviation Administration |work= Lessons Learned}}</ref>

In [[1979 in aviation|1979]] a CF6-6 engine detached from the left wing of [[American Airlines Flight 191]] due to faulty pylon maintenance, severing hydraulic lines and causing the aircraft to crash.

In [[1989 in aviation|1989]], a CF6-6 fan disk separated from the engine and damaged all three hydraulic systems. The flight, [[United Airlines Flight 232]], continued with no hydraulic power until it crash-landed at the airport in [[Sioux City, Iowa]].

In 2000, the [[National Transportation Safety Board]] (NTSB) warned that the high-pressure compressor could crack.<ref>{{cite web |url= https://www.ntsb.gov/safety/safety-recs/recletters/A00_104.pdf |title= Safety Recommendation A-00-104 |publisher=National Transportation Safety Board |date=August 9, 2000 |format=PDF}}</ref>

Following a series of high-pressure turbine failures on 6 September 1997,<ref>{{cite web |url= http://aviation-safety.net/database/record.php?id=19970906-1&lang=en |title= Report on aircraft C-FTCA 6 September 1997 engine failure |publisher= Aviation Safety Network}}</ref> 7 June 2000<ref>{{cite web |url= http://aviation-safety.net/database/record.php?id=20000607-1&lang=en |title= Report on aircraft PP-VNN 7 June 2000 engine failure |publisher= Aviation Safety Network}}</ref> and 8 December 2002,<ref>{{cite web |url= http://aviation-safety.net/database/record.php?id=20021208-1&lang=en |title= Report on aircraft ZK-NBC 8 December 2002 engine failure |publisher= Aviation Safety Network}}</ref> and resulting in 767s being written off on 22 September 2000,<ref>{{cite web |url= http://aviation-safety.net/database/record.php?id=20000922-0&lang=en |title= Report on aircraft N654US 22 September 2000 engine failure |publisher= Aviation Safety Network}}</ref> on 2 June 2006,<ref>{{cite web |url= http://aviation-safety.net/database/record.php?id=20060602-0 |title= Report on aircraft N330AA 2 June 2006 engine failure |publisher= Aviation Safety Network}}</ref> and [[American Airlines Flight 383 (2016)|on 28 October 2016]],<ref>{{cite web |url= http://aviation-safety.net/database/record.php?id=20161028-2 |title= Report on aircraft N345AN 28 October 2016 engine failure |publisher= Aviation Safety Network}}</ref> the [[Federal Aviation Administration]] issued an airworthiness directive mandating inspections for over 600 engines and the [[NTSB]] believed that this number should be increased to include all -80 series engines with more than 3000 cycles since new or since last inspection.<ref>{{cite web |url= https://www.flightglobal.com/news/articles/us-aviation-safety-board-ntsb-wants-at-risk-ge-cf6-engines-removed-following-june-uncontained-failure-on-aa-767-208851/ |title= NTSB wants at-risk GE CF6 engines removed |work= Flight International |date= September 5, 2006}}</ref>

In May 2010, The NTSB warned that the low-pressure turbine rotor disks could fail.<ref>{{cite web |url= https://www.ntsb.gov/news/press-releases/Pages/Four_Recent_Uncontained_Engine_Failure_Events_Prompt_NTSB_to_Issue_Urgent_Safety_Recommendations_to_FAA.aspx |title= Four Recent Uncontained Engine Failure Events Prompt NTSB to Issue Urgent Safety Recommendations to FAA |date= May 27, 2010 |publisher= National Transportation Safety Board }}</ref> Four [[Jet engine#Uncontained failures|uncontained failures]] of CF6-45/50 engines in the preceding two years prompted it to issue an "urgent" recommendation to increase inspections of the engines on U.S. aircraft : none of the four incidents of rotor disk (rotating) unbalance and subsequent failure resulted in an accident, but parts of the engine did penetrate the engine housing in each case.<ref name=Ahlers2008-05-28>{{cite web |url= http://www.cnn.com/2010/US/05/27/ntsb.engine.failures/index.html?hpt=T2  |title= Jet engine failures overseas prompt 'urgent' NTSB recommendation here |author= Mike M. Ahlers |publisher= CNN |date= May 28, 2010}}</ref>