Investigation Summary
The flight was a routine training exercise involving one instructor and six pilots under training. Having departed at 13:10 local time, the crew spent over an hour performing circuit maneuvers. During the final approach phase at approximately 14:50, the aircraft entered a left hand turn to align with the runway. Investigators determined that the airspeed during this turn was insufficient to maintain lift, leading to an aerodynamic stall. Due to the low altitude of the aircraft at the time of the stall, the crew had no margin for recovery before the airframe impacted the Rajawali housing complex. The aircraft was not equipped with flight data recorders, which is common for older military transport assets in the Indonesian inventory, complicating the granular reconstruction of the cockpit environment.
Final Conclusions
The investigation concluded that the primary cause was an aerodynamic stall during the final turn to the runway. The stall was precipitated by an approach speed that was too low for the flight configuration. The proximity to the ground at the moment of the stall made recovery impossible. The aircraft was built in 1976 and was part of a fleet slated for replacement by newer CASA C-295 aircraft.
Video Analysis
No video analysis linked for this case file yet.
Airframe & Maintenance
Systems & Failure Modes
Flight Data Recorders
The aircraft lacked black boxes, which limited investigators to physical wreckage analysis and witness statements to determine the cause.
Aerodynamic Lift
The aircraft failed to maintain sufficient airspeed during a banking maneuver, causing the wings to exceed the critical angle of attack and stall.
Interesting Facts
- 01The aircraft was a Fokker F27 Friendship 400M, with Manufacturer Serial Number (MSN) 10546.
- 02While some reports (such as Wikipedia) claim the aircraft was built in 1958, official aviation databases record the manufacture year as 1976.
- 03All seven occupants on the aircraft were military personnel, including one instructor and six trainees.
- 04Four people on the ground were killed; local media reports cited by Wikipedia also state 11 others were injured in the housing complex.
- 05The aircraft was not equipped with a Flight Data Recorder (FDR).
- 06The co-pilot initially survived the impact but died from his injuries at a hospital a few hours later.
Safety Actions & Advisories
Fleet Modernization
Following the accident, the Indonesian Air Force accelerated plans to replace the aging Fokker F27 fleet with newer Airbus/CASA C-295 transport aircraft.