History of the Flight
On 14 February 2011, a Boeing 737-900 aircraft, registration PK-LFI, operated by PT. Lion Mentari Airlines as flight LNI 392, departed from Soekarno-Hatta Airport, Jakarta, for Sultan Syarif Kasim II Airport, Pekanbaru. The pilot held and waited for weather improvement before continuing the approach after conditions improved above landing minima. At 14:20 UTC (21:20 local time), the aircraft landed at Pekanbaru. The weather was rainy, and the runway was wet. The tower controller cleared the aircraft to land and reported calm wind, but the pilot observed a tailwind of up to 11 knots on the Flight Management Computer (FMC). The aircraft overran the runway and came to a stop on the stopway, with the right main wheels stuck at the corner of the stopway. Passengers evacuated normally via passenger stairs, and no one was injured.
Runway Conditions
Examination of the runway found rubber deposits and several spots of standing water up to 3 cm deep.
Flight Recorder Data
The Digital Flight Data Recorder (FDR) data revealed that the aircraft reached its target deceleration until the thrust reversers were stowed at 1000 feet of remaining runway length, when the aircraft speed was approximately 70 knots.
Conclusion
The investigation concluded that the aircraft decelerated according to the preselected value until the thrust reversers were stowed, which occurred at the last 1000 feet of the available runway, with the aircraft speed approximately 70 knots.