Hong Kong investigators have found that the “inappropriate” use of autobrake mode of a China Eastern Airlines Airbus A321 - coupled with inclement weather - led to the aircraft veering off the runway after landing. The aircraft (B-6366, MSN3593) was operating flight MU735 from Nanjing to Hong Kong on 24 May 2017 when the incident occurred. No injuries were reported among the nine crew members and 132 passengers. Hong Kong’s Air Accident Investigation Authority (AAIA) states in its final investigation report that the weather at the time was heavy rain with poor visibility, leading the flight crew to initiate a go-around on Runway 07L, before requesting a change of runway to Runway 25R. The narrowbody landed on Runway 25R at 10:49 local time, and was instructed to vacate via Taxiway A4. However, the aircraft missed the taxiway and veered off the runway centreline into the grass area on the right side of the runway. Its nose wheel and right-hand main landing gear were on the grass area. The AAIA found while the aircraft’s landing airspeed and descent rate were normal, the autobrake mode was selected for long and dry runways. Investigators note that during the go-around, the flight crew “should be aware that the runway was not dry”. Furthermore, the aircraft landed long and only touched down about 760ft past the 1,500ft aiming point marking, which reduced the time and distance to decelerate. <br/>