PK740
1979-NOV-26 · Near Taif, Saudi Arabia

Pakistan International Airlines — Flight PK740

A Boeing 707 carrying Hajj pilgrims crashed in the mountains near Taif after a catastrophic in-flight fire broke out in the aft cabin. Despite attempts to return to Jeddah, the fire spread so rapidly that the crew was likely incapacitated by smoke, leading to a total loss of control.

Aircraft
Boeing 707-340C
Registration
AP-AWZ
Phase
Cause
Souls on Board
156
Fatalities
156
Origin → Dest
Jeddah International Airport, Saudi Arabia → Jinnah International Airport, Karachi, Pakistan
Report

Investigation Summary

The flight departed Jeddah at 01:29 local time. Approximately 18 minutes into the flight, as the aircraft reached its cruising altitude of 30,000 feet (FL300), a flight attendant reported a fire near the rear passenger door. The fire intensified with extreme speed, preventing the crew from successfully executing an emergency return. Investigators faced difficulties due to the lack of conclusive physical evidence, but the primary theory involves the use of portable stoves by pilgrims. At the time, it was not uncommon for passengers to carry small gasoline or kerosene stoves to prepare food. It is believed that the pressure differential during the climb and at cruise altitude caused a fuel leak from such a device, which then ignited.

Final Conclusions

The Saudi-led investigation concluded that the most probable cause was the ignition of leaking fuel from one or more portable stoves carried by passengers. The fire's rapid spread was likely fueled by the cabin's interior materials and the panic of passengers moving forward, which may have shifted the aircraft's center of gravity or allowed smoke to overwhelm the cockpit crew.

Video Analysis

No video analysis linked for this case file yet.

Airframe & Maintenance

Airframe Hours
30,710
Engines
Pratt & Whitney JT3D-3B

Crew Experience

captain

Total hours
4,693
On type
476

476 on the Boeing 707 and 720

first officer

Total hours
1,379
On type
242

Systems & Failure Modes

i

Aft Cabin Door Area

The location where the fire was first spotted by cabin crew.

i

Pressurization System

The pressure differential during climb is believed to have caused improperly sealed passenger stoves to leak fuel.

Interesting Facts

  • 01The aircraft was a 9-year-old Boeing 707 that had previously been leased to British Caledonian.
  • 02Most of the 145 passengers were pilgrims returning from the Hajj in Mecca.
  • 03The crash remains the third-deadliest aviation accident on Saudi Arabian soil.
  • 04Debris from the impact was scattered over an area of approximately three miles.
  • 05The investigation officially discounted sabotage and electrical failure due to lack of evidence.

Safety Actions & Advisories

Prohibition of Portable Stoves

Stricter enforcement and eventual total bans on carrying portable gas or kerosene stoves in passenger cabins were implemented, particularly on Hajj charter flights.

Cabin Material Flammability Standards

The accident contributed to the industry-wide push for more fire-resistant cabin materials and improved smoke evacuation procedures.

Location

Near Taif, Saudi Arabia · 21.5000, 39.8500

ACCIDENT SITE · Coordinates taken from the wikidata coordinate.

Case File History

  1. CorrectionUpdated investigation summary and event timeline.

Related Cases

Case ID · pia740-1979Last updated · Filed

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