"Fokker 50 crash crew ignored multiple alerts during take-off rollFokker 50 crash crew ignored multiple alerts during take-off roll.
By David Kaminski-Morrow21 February 2020
Kenyan investigators have disclosed that the crew of a Fokker 50 continued a take-off roll, despite multiple alerts apparently warning of a serious engine problem, before the aircraft crashed some 50s after becoming airborne.
The inquiry into the accident, involving a Skyward International Aviation turboprop departing Nairobi’s main international airport, found that 27 high-level ‘triple-chime’ alerts had sounded as the aircraft rolled along runway 06.
Aural alerts had commenced as early as 8s after the take-off was initiated but, while the aircraft was well below the V1 decision speed, the crew did not act to abort the take-off roll.
Flight-data recorder information indicates the left-hand Pratt & Whitney Canada PW125 engine was exhibiting problems, with increasing torque but declining propeller speed compared with the right-hand engine.
“On [its] ground roll for take-off, the aircraft seemed to take [more] runway than anticipated before attaining the take-off speed,” the Kenyan air accident investigation department states, indicating that the roll lasted over 90s.
The aircraft lifted off from the high-elevation airport at about 100kt but “barely climbing”, the inquiry says, reaching no more than 50ft above ground after about 20s while continually deviating to the left of the extended centreline.
It subsequently collided with a building 2,100m north-north-east of the runway end. None of the four occupants – two pilots, an engineer and a loadmaster – survived."
https://www.flightglobal.com/safety/...136871.article