By JASON GIMA WURI
THE fatal Airlines PNG Dash 8 crash on Oct 13 near Madang was
caused by the “over-speeding” of both propellers, a preliminary report
of the Papua New Guinea Accident Investigation Commission has found, The National reports.
The commission said the propellers exceeded their maximum permitted revolutions per minute by more than 60%.
It said because of this there was a loud “bang” which witnesses on the ground reported hearing.
The flight crew then shut down both engines.
“At 5.17pm the crew made a mayday call to air traffic control and
indicated they were having an in-flight emergency and that both engines
had stopped.
“Madang tower then declared a search and rescue phase, believing the aircraft was about to ditch into the ocean.
“But the aircraft landed on a sparsely timbered terrain on the northern
side of the Buang River, 33km southeast of Madang town, killing 28 of
the 32 people on board.”
The report said that on impact, the plane was badly damaged while
colliding with trees and the ground and an intense fuel-fed fire
started.
Villagers who had heard and seen the aircraft in the final stages of its
descent rushed to the crash site to find the fuselage engulfed in
flames.
They then helped the four survivors and took them to the nearest aid post.
The preliminary report was released last Friday by the commission’s
acting chief executive officer Sid O’Toole, who said they had met the
requirement for a preliminary report to be ready within 30 days.
It said the pilot in command, 64, and his 40-year-old first officer had
18,200 flying hours and 2,750 flying hours respectively, with both
holding valid PNG airlines transport pilot licences.
The report said the flight progressed normally and flight P2-MCJ was
transferred to Madang air traffic control at 5.10pm on descent into
Madang.
“The descent profile on this sector was steep because of the proximity
of the Finisterre Ranges to Madang and the pilot, who was the handling
pilot, was hand-flying the aircraft because the autopilot was
unserviceable.”
The report said the pilot was manoeuvring the aircraft visually to avoid cloud and thunderstorms.
At 5.12pm, in response to a request from Madang tower, the flight crew
stated that the aircraft was 24 nautical miles from Madang, leaving
13,000ft on descent.
O’Toole said: “The Dash 8 has a turbine engine which runs through a gear
box and it runs through the propellers and over-speed caused
self-destruction.
“The investigations have been supersonic and we thank Prime Minister
Peter O’Neill for visiting the site and we are glad that O’Neill has
made a commitment to release funds to complete the investigation,” he
said.
“We thank TropicAir for their help in this time.”
Civil Aviation Minister Puri Ruing thanked the commission, the Aviation
Transport Safety Bureau of Australia, the Transport Safety Board of
Canada, aircraft manufacturer Bombardier, engine manufacturer Pratt and
Whitney, the Civil Aviation Safety Authority of PNG (CASA) and Airlines
PNG for their cooperation and help in enabling the investigation to
progress
efficiently and effectively, resulting in the preliminary report being issued in under 30 days.
“The accident investigation will continue for some time in order to
establish root casual factors for the accident and the final report may
take a year to complete due to the detailed analysis that is required,”
Ruing said.
The information in the preliminary report was derived from initial investigation of the occurrence.
However, people were cautioned that there was the possibility that new
evidence may become available that altered the circumstances described
in the preliminary findings.