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Families of the Pakistan cargo crash call for international assistance to find black boxes

Families of the five crew aboard a Boeing 737 cargo aircraft that crashed in the Arabian Sea near Pakistan last week are urging a global search to locate the flight recorders and determine the cause.

The debris from the K2 Airways cargo plane was recovered shortly after the crash on July 7, but the depth of the water is approximately 3,000 meters (9,800 feet).

Aviation experts who are familiar with deep-water crashes like Air France 447, in 2009, say that finding the "black boxes", would require an expensive underwater search. They may also need foreign assistance.

The locator beacons of the plane, which is 27 years old, were only designed to send pings for 30 days. The recovery of the recorders may reveal if a navigation issue reported just before the crash is linked to a component that was replaced by relatives before the flight.

Pakistan has not provided a public update for the last week. An industrial company that specializes in underwater search told them they had never heard from Pakistan about requests for help?from foreign companies and navies.

Yashib Rizwan is the oldest son of Captain Rizwan. He said, "We need to continue our search and use all resources available, both locally and internationally." For us, a transparent investigation is essential.

Abdur Rafay Siddiqui is the son of engineer Muhammad Arif Siddiqui. He has also requested international assistance, if necessary.

After losing hope that the bodies will be recovered, both families held funeral prayers.

The Pakistani government hasn't responded to questions about whether or not it would seek outside assistance to find the plane.

K2, the company that lost its sole plane in the crash has not responded to any requests for comment.

NAVIGATIONAL SYSTEM ISSUE

Pakistan's airports authorities said that the pilots reported an issue with their navigational system at 9:18 pm Pakistan time, while flying from Sharjah to Karachi in the United Arab Emirates.

The authority reported that local air traffic control attempted to guide the plane, but after three minutes, radar systems showed it descending quickly and communication had been lost.

Flightradar24 showed that the plane plummeted about 5,000 feet within a minute. It then climbed about 6,500 feet in just 30 seconds, before entering a catastrophic dive at 36,550 feet.

Ghulam Jatoi, the father-in law of the co-pilot, Faisal, revealed that the plane stayed in Sharjah for about 10 days before taking off while the pilots awaited the arrival of a replacement component from the U.S.

Yashib Rizwan, son of the captain, said that one of the two inertial references units (IRUs) which feeds information about the aircraft's speed, position and orientation to cockpit displays was replaced in Sharjah.

John Goglia said that if you are having a problem with your IRU you can't depend on the instruments. He added that pilots flying at night over oceans without visual references may have difficulty determining the orientation of the aircraft.

It is unclear whether the IRU replacement was related to the crash.

In the Adam Air crash of 2007, the inertial reference systems malfunctioned. The pilots were fixated on resolving erroneous data, and failed to notice the steep right bank. They lost control, the plane plunged into sea, killing the 102 passengers.

The U.S. Navy assisted in the search for the black boxes of the Adam Air aircraft about three weeks following the crash. However, recovering the recorders after a month-long, multimillion-dollar operation using a remotely operated vehicle took months.

Todd Curtis, a U.S. aviation specialist, said in the podcast "Flight Safety Detectives," that Pakistan would not mount a similar operation unless it had a compelling cause. The K2 aircraft was an old cargo jet and not a passenger model currently being produced. (Reporting from Akhtar Shahid and Ariba Shehid in Karachi, Additional reporting by Allison Lampert and Dan Catchpole in Seattle and Shilpa jamkhandikar in Montreal; Writing and editing by Jamie Freed.)

(source: Reuters)