Investigation Summary
Pakistan International Airlines Flight 404 was a short domestic flight operating in the highly challenging terrain of northern Pakistan. The flight departed Gilgit at 07:36 PKT, following a standard route that required visual navigation and frequent position reporting due to the lack of radar coverage in the deep mountain valleys. At 07:40, the crew provided a routine position report, indicating they expected to reach the 'Bravo' waypoint (near Bunji) at 07:59. This was the final communication. When the aircraft failed to arrive in Islamabad, a massive search operation was launched involving Pakistani C-130s and helicopters, as well as Indian Air Force assets on the other side of the Line of Control. The search focused on the area around Nanga Parbat, one of the world's highest peaks, but the rugged, snow-covered terrain and extreme altitudes prevented the discovery of any debris.
Final Conclusions
The aircraft is presumed to have crashed in the Himalayas. Due to the total absence of wreckage, the specific cause of the accident remains unknown. Potential factors include Controlled Flight Into Terrain (CFIT) due to poor visibility or mountain waves, mechanical failure, or extreme weather conditions common in the high-altitude environment of the Karakoram and Himalayan ranges.
Video Analysis
DISASTER BREAKDOWN (Pakistan International Airlines Flight 404) — A detailed look at the disappearance of PK404, exploring the flight path, the challenging environment of Gilgit Airport, and the search efforts that followed the aircraft's vanishing in 1989.
If playback is blocked, the owner has disabled embedding — use the link above.
Airframe & Maintenance
Systems & Failure Modes
Rolls-Royce Dart 532-7E
The turboprop engines powering the Fokker F-27.
VHF Radio
The primary means of communication used for the final position report at 07:40.
Interesting Facts
- 01The aircraft has never been found, making it one of Pakistan's greatest aviation mysteries.
- 02The flight was carrying 49 passengers and 5 crew members.
- 03The search area included Nanga Parbat, an 8,000-meter-high mountain known for extreme weather and treacherous terrain.
- 04The aircraft was 27 years old at the time of its disappearance.
- 05Gilgit Airport required specific safety procedures, including takeoff from Runway 07 regardless of wind direction due to terrain.
Safety Actions & Advisories
Fleet Modernization
Following multiple fatal accidents involving the Fokker F-27, PIA eventually phased out the type in favor of more modern ATR aircraft for northern mountain routes.
Known Controversies & Unanswered Questions
Military Shoot-down Theory
Reference ↗Speculation exists that the aircraft may have been shot down by the Indian military after accidentally crossing the Line of Control, though no evidence has ever been found to support this claim.