25th of February 2020
A Boeing 737-300 Cargo was scheduled to operate a scheduled cargo flight from Sentani Airport to Wamena Airport both in Papua, it was the first of four scheduled flights this day between both airports.
Onboard the two pilots and two passengers and several tons of cargo.
The broken nose landing gear (Source http://knkt.dephub.go.id/)
At 07.00 local time (lt) the crew arrived at the aircraft. While the co-pilot conducted the cockpit preparation the captain performed the walk-around check. Once the external tasks were performed the captain joined
the first officer on the flight deck to complete the setup and preparations.
Once all preparations were completed startup and pushback clearance was obtained, and the engines were started during the pushback. At 07.25 lt taxi clearance was issued and the crew taxied to Runway 30. Once at the runway the crew was cleared to backtrack to the beginning of Runway 30. Once lined up the take-off clearance was issued, with the instruction to fly a heading of 270º and climb to 8000 feet initially. The take-off was initiated and at 80 knots the Pilot Monitoring made the required call. A few seconds later the crew noticed a vibration through the aircraft that increased with the increasing speed of the aircraft.
At a speed of ~110 knots, the Pilot Flying decided to reject the take-off. Once the take-off was rejected the Pilot Flying felt that the aircraft could not be controlled as normal and that the brakes ad little to no effect.
Damage inlet (source: http://knkt.dephub.go.id/)
This resulted in the aircraft veering to the right until it left the runway. This caused the nose of the aircraft to turn left, more or less on the runway heading. After crossing a taxiway the aircraft started to slow down while rotating through a 360º spin. The aircraft finally stopped on the right shoulder of Runway 30, 1600 meters from the beginning on a heading of 270º. The aircraft received substantial damage
two 50 cm scratches, just aft of the e/e bay
DME antenna broke off
VHF #2 antenna broken off
Left engine inlet damaged
A triangular-shaped piece of concrete (40x40x40 cm), 16-centimeter thick piece of concrete was found in the left-hand engine
Al fan blades of the lefthand engine were damaged
Dent in the right-hand engine inlet
Extensive damage to the nose landing gear - Both axles broken - Steering assembly damaged - Torsion link damaged
Left main landing gear sliding member had rotated nearly 90º from the normal position due to broken torsion links. (See picture above, source http://knkt.dephub.go.id/)
The left shimmy damper had broken off the torsion link, with parts of the shimmy damper missing. (found 300 meters away from the aircraft)
The right-hand torsion link was broken
Left-hand engine inlet as found with a piece of concrete. (source: http://knkt.dephub.go.id/)
In 2015 Boeing had issued a service letter (737-SL-32-057-E) with the title; "Main Landing Gear (MLG) Lower Torsion Link Fractures" for Boeing 737-100 through 500 aircraft, with the procedure to bleed the shimmy damper. As the final report is not available yet the cause has not been established, but a shimmy damper failure or torsion link failure is a likely cause. The preliminary report is available by clicking here.