Investigation Summary
The flight was a routine domestic service from Penang to Kuala Lumpur. As the crew prepared for landing at Subang Airport, an unidentified hijacker gained access to the cockpit. The crew initially complied with the hijacker's demands, notifying air traffic control of the situation and diverting toward Singapore. Cockpit voice recorder (CVR) data revealed a tense atmosphere where the pilots warned the hijackers that the aircraft lacked sufficient fuel to reach Singapore. Shortly after this exchange, gunshots were recorded, and investigators concluded that both Captain GK Ganjoor and First Officer Karamuzaman Jali were shot. The aircraft, left without professional pilot input, began a series of erratic pitch oscillations. It eventually dove into a mangrove swamp at a near-vertical angle, disintegrating on impact. Despite extensive investigation, the identity and motives of the hijacker(s) were never officially established.
Final Conclusions
The Malaysian Department of Civil Aviation concluded that the aircraft was hijacked by person or persons unknown. The crew was incapacitated by gunfire during the diversion to Singapore, leaving the aircraft 'professionally uncontrolled.' The crash was the direct result of this loss of control following the shooting of the flight crew. No evidence of pre-impact structural failure, fire, or explosion was found.
Video Analysis
Plane Hijacking. Malaysian Airline System Flight 653 — An overview of the first fatal crash in the history of Malaysia Airlines, involving the hijacking and subsequent crash of a Boeing 737 in 1977.
Watch on YouTube ↗If playback is blocked, the owner has disabled embedding — use the link above.
Systems & Failure Modes
Cockpit Voice Recorder (CVR)
Captured the sounds of the hijacking, the fuel warnings from the pilots, and the gunshots that incapacitated the crew.
Flight Control System
The aircraft became 'professionally uncontrolled' after the pilots were shot, leading to erratic pitching maneuvers.
Interesting Facts
- 01This was the first fatal accident in the history of Malaysia Airlines.
- 02All 100 people on board, including 93 passengers and 7 crew members, perished.
- 03The aircraft hit the ground at a near-vertical angle and a very high speed.
- 04The identity of the hijacker and their motive remains officially unsolved.
- 05The victims' remains were buried in a mass grave at the Tanjung Kupang Memorial Park.
Safety Actions & Advisories
Enhanced Airport Security
Following the disaster, Malaysia implemented stricter security screening protocols at domestic airports to prevent weapons from being carried into aircraft cabins.
National Aviation Security Committee
Source ↗The Malaysian government established the National Aviation Security Committee to oversee and coordinate security measures across all Malaysian airports in response to the hijacking.
Known Controversies & Unanswered Questions
Identity of the Hijacker
Reference ↗While some reports suggested a member of the Japanese Red Army was responsible, no group ever claimed responsibility and the hijacker's identity was never formally confirmed by investigators.