On 19 April 2018, a Boeing 737-900 made a high speed rejected takeoff at Kathmandu in response to a configuration warning and overran the runway without serious consequences. The Investigation found that when a false Takeoff Configuration Warning caused by an out of adjustment switch had been annunciated just after V1, the Captain had decided to reject the takeoff because of concerns about the local terrain and locally adverse weather. It was noted that the aircraft operator did not provide criteria for rejecting takeoff up to or above the 80 knot crosscheck but that the Boeing reference QRH did so.
Description
On 19 April 2018, a Boeing 737-900 (9M-LNJ) being operated by Malindo Air on a scheduled international passenger flight from Kathmandu to Kuala Lumpur commenced a high speed rejected takeoff on runway 20 in normal night visibility and overran the runway by approximately 50 metres without any serious damage to the aircraft or injuries to the 139 occupants. An emergency evacuation was not required but occupants had to disembark using a slide because the soft ground meant that stairs could not be positioned at the aircraft.
The aircraft in its final stopping position. [Reproduced from the Official Report]
Investigation
An Investigation was carried out by the Malaysian Air Accident Investigation Bureau (AAIB). The FDR and CVR were removed but no relevant data was obtained as their CBs were not tripped by the flight crew after the event. Data from the QAR was, however, available.
It was noted that the 45 year-old Captain had a total of 14,349 flying hours experience which included 6,473 hours on type and the 30 year-old First Officer had a total of 3,022 flying hours experience of which all but 200 hours were on type. The weather report at the time gave the wind as 150° at 4 knots, the visibility as 7000 metres and no cloud below 1,500 feet.
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