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By David Kaminski-Morrow2021-05-18T09:27:00+01:00
Investigations into the fatal Sriwijaya Air Boeing 737-500 accident earlier this year have spurred an order to operators of older 737 variants to conduct autothrottle checks aimed at detecting possible flap synchronisation component failure.
But the US FAA is stressing that latent failure of the synchronisation wire is “highly unlikely” to have caused the crash, off the coast of Indonesia on 9 January, according to preliminary information from the inquiry.
Over the course of the investigation, however, Boeing has stated that such a failure might go undetected by the autothrottle computer on the aircraft.
Autothrottles on the 737-300, -400 and -500 were the subject of an upgrade in 2001 after incidents in which thrust levers would slowly move apart, generating asymmetric thrust and causing the aircraft to bank excessively and enter a roll.