According to Japanese delegation to ICAO, number of parts falling from the aircraft has increased to 64 in 2017, from 46 in 2016.
A total of 437 cases of plane parts falling from the sky were confirmed from April 2009 through October 2016, according to a survey by the ministry. There was decline since the 61 recorded in 2012, but the number started to increase again.
The falling parts included lights, bolts, panels and tire rubber, among other items., and the most serious was on 23 Sept 2017, a panel weighing 4.3kg fell off a KLM Royal Dutch Airlines plane, and hit a car on a road in Osaka.
On 27 Sept 2017, a panel weighing about 3kg that had fallen off an All Nippon Airways aircraft was found in Ibaraki Prefecture.
In May 2018, a shower of more than 100 metallic engine parts from a departing aircraft at Kumamoto.
According to delegation, the local authorities have implemented various methods to minimise the problem., which include draining of water-supply pipes before take-off, to prevent ice build-up, potential aircraft modification, improved root-cause analysis, ramp inspection and maintenance.