"Apparently (the crash) was due to human error, the aircraft was in perfect condition and the pilot had more than 9,000 flight hours," Toledo said in government palace. "Something happened and this will be cleared up with the investigation," he added.

The aircraft crashed directly into a steep mountain at an altitude of 7,500 feet and disintegrated, officials said Saturday on locating the crash site near Chachapoyas, 390 miles north of Lima, after a two-day search that was hindered by heavy rains and thick fog.

Toledo said the aircraft's two flight recorders, which could hold the key to the definitive cause of the crash, would be send to Washington on Monday.

The remains the crash victims were spread over a 1,300 feet radius and only six of the dead have been identified. On Monday, family members of the victims were being flown in government helicopters over the crash site.

Relatives of some of the victims released a statement saying that the search to recover the remains of their loved ones had been insufficient.

Flight 222, with eight children among its 42 passengers and four crew members, disappeared minutes before it was due to land last Thursday. Six foreigners -- a Cuban man, a Spanish woman, two Dutchmen and Belgian with his Portuguese wife -- were on board.

The jet left the coastal city of Chiclayo shortly after 8 a.m. for the 30-minute flight and lost contact with air traffic controllers at around 8:43 a.m., apparently after pilots had sighted the 6,300-foot runway.