( WASHINGTON ) -- The Federal Aviation Administration ordered U.S. airlines Thursday to replace a part that has come under suspicion in the crash of Air France Flight 447 . U.S. air safety authorities have ordered the replacement of a part on A330 planes following the crash of Air France Flight 447 . The FAA gave airlines 120 days to replace devices that could be giving false airspeed indications . All 228 people on Air France Flight 447 were killed when the Airbus A330 plane crashed June 1 en route to Paris , France , from Rio de Janeiro , Brazil . The U.S. air safety watchdog agency bypassed the usual process which allows for public comment on its orders . It said it could expedite the process because of the limited number of planes involved -- only 43 in the United States -- and because they say it is prudent to make the change as quickly as possible . At the same time , it said it did not feel the risk warranted grounding the fleet of aircraft . US Airways , one of only two American carriers who fly planes affected by the order , said Thursday they had already replaced the part . `` The work was completed last week . We are scheduled to take delivery of three new ... A330s by year 's end and those three will not require any ... changes , '' a US Airways spokesman told CNN via e-mail . Northwest is the other U.S. carrier that operates A330s , the FAA said . A spokeswoman for Delta airlines , Northwest 's parent company , said affected Northwest planes are getting new parts . `` We are well under way working closely with Airbus and Goodrich to install the Goodrich pitot tubes within the required timelines , '' Ashley Black told CNN . The devices under suspicion are the Thales Avionics pitot probes on some Airbus A330 and A340 aircraft . They measure `` ram air pressure , '' the pressure exerted on the plane as it flies through the air , and are part of a system used to determine air speed . The FAA order requires aircraft operators to replace certain Thales pitot probes with certain Goodrich or newer-design Thales pitot probes . The FAA says the order is intended to `` prevent airspeed discrepancies , which could lead to disconnect of the autopilot and/or auto-thrust functions and consequent increased pilot workload . '' French authorities are still investigating the cause of the Air France crash . But tests conducted since the crash have brought into question the performance of the pitot tubes and authorities say there have been reports of other malfunctions on flights . No U.S. operator flies A340s . There are 302 of the aircraft worldwide . The FAA action follows an announcement by European air safety authorities earlier this week to require pitot tube replacements by September 7 .
NEW : Work ` ` well under way , '' Northwest parent company , says . FAA orders all airlines to replace devices under suspicion in Air France aircraft . The devices could be giving false airspeed indications . Northwest and US Airways are only U.S. carriers that fly these planes .