Accident description
Last updated: 27 November 2014
Status:Final
Date:Friday 8 March 1968
Time:19:18
Type:Silhouette image of generic F27 model; specific model in this crash may look slightly different
Fairchild F-27
Operator:Air Manila International
Registration: PI-C871
C/n / msn: 19
First flight: 1958
Total airframe hrs:21194
Crew:Fatalities: 4 / Occupants: 4
Passengers:Fatalities: 10 / Occupants: 10
Total:Fatalities: 14 / Occupants: 14
Airplane damage: Destroyed
Airplane fate: Written off (damaged beyond repair)
Location:ca 2 km N off Ibajay (   Philippines) show on map
Phase: En route (ENR)
Nature:Domestic Scheduled Passenger
Departure airport:Manila International Airport (MNL/RPLL), Philippines
Destination airport:Mactan Island-Chicago Naval Air Base (NOP/RPVM), Philippines
Flightnumber: 507
Narrative:
Air Manila Flight 507 departed Manila (MNL) at 18:14 for a flight to Mactan at FL130. Thunderstorms existed along the route and the crew probably deviated some 10nm right of the airway to avoid the hazardous weather. It was believed that the aircraft suddenly flew into a hidden cumulonimbus that may have appeared as a minor build up, but which was actually a fully developed and active cumulonimbus. Air loads associated with a sudden pull up manoeuvre, combined with gust loading probably caused both horizontal stabilizers to fail. The right-hand outer wing then failed due to air loads generated by a high angle of attack. The F-27 then went out of control and the fuel, escaping from the ruptured fuel tanks, ignited. The aircraft was flown at 180 knots, 40 knots more than recommended turbulent air operating speed.
Parts of the aircraft fell into the sea, just offshore.


PROBABLE CAUSE: "In-flight structural failure due to air loads exceeding the design strength, while flying in a thunderstorm cell."

Classification:
Turbulence
Wing failure
Loss of control

Sources:
» ICAO Circular 107-AN/81 (215-221)


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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Manila International Airport to Mactan Island-Chicago Naval Air Base as the crow flies is 564 km (352 miles).

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Fairchild F-27

  • 11th loss
  • 129 built
  • 5th worst accident (at the time)
  • 11th worst accident (currently)
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 Philippines
  • 16th worst accident (at the time)
  • 30th worst accident (currently)
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