What happened
On 2 November 2010, a Boeing 737-400, registration PK-LIQ, was performing a scheduled passenger flight from Soekarno Hatta International Airport to Supadio Airport. The flight carried 175 people, including 169 passengers and 6 crew members. During the taxi phase at the departure airport, the crew noted the illumination of the yaw damper light on two occasions, which they addressed using the Quick Reference Handbook.
As the aircraft approached Pontianak, the pilot flying prepared for an ILS approach for runway 1s5. During the descent, the autopilot failed to follow the glide path, forcing the pilot to disengage the autopilot and auto-throttle to manually correct the aircraft's pitch. During this maneuver, a discrepancy was noted where the flap lever was set to 40°, but the indicator showed only 30°. Although the flaps were eventually successfully moved to the 40° position at 600 feet, the aircraft touched down beyond the designated touchdown zone.
Upon landing, the crew encountered significant difficulties with the aircraft's deceleration systems. The pilot found the thrust reverser levers difficult to manipulate, and the speed brakes failed to deploy automatically. To compensate for the lack of deceleration, the pilot applied maximum manual braking and manually deployed the speed brake handle. The aircraft eventually came to a stop approximately 70 meters from the runway end, near the stop-way. Following the stop, the crew initiated an evacuation. There were 0 fatalities and 0 injuries reported.
Findings
- The aircraft had a documented history of mechanical issues involving the thrust reversers and the automatic deployment of speed brakes over the preceding three months.
- The failure of the speed brakes to deploy automatically and the difficulty in engaging the thrust reversers prevented the aircraft from stopping within the normal touchdown zone.