The Pakistani commercial plane's flight data recorder, which plunged into a residential area of Karachi, was found, an official said on Saturday when the death toll rose to 97.
There were two survivors aboard the plane, while no deaths were reported in the densely populated area of the city where the plane crashed on Friday.
Pakistan International Airlines' PK 8303 flight, an Airbus A320, flew from Lahore to Karachi with 99 people when it crashed in the afternoon on a second landing attempt.
"The black box was found late yesterday and we are handing it over to the committee of inquiry," said PIA spokesman Abdullah Khan. He said that both the flight data recorder and the cockpit voice recorder were included.
The airline's managing director, Arshad Malik, said on Friday that the last message received from the pilot had indicated that a technical problem had occurred.
Another senior civil aviation official told Reuters that the aircraft was unable to lower the landing gear on the first approach.
Aviation safety experts say that plane crashes usually have several causes.
A few seconds before the crash, the pilot informed the air traffic controller that he had lost the power of both engines. This emerges from a record published on liveatc.net, a respected aviation surveillance website.
According to Airbus, the jet first flew in 2004 and was powered by CFM International engines, which General Electric and Safran from France jointly own.
Pakistani Prime Minister Imran Khan announced shortly after the crash that an investigation would take place, and a team of four was formed on Friday evening, Reuters said.
The team consists of three members of the Aircraft Accident and Investigation Board and one member of the Safety Board of the Pakistan Air Force. The team will make a preliminary statement within a month, the notification says.
A statement by the provincial health ministry on Saturday put the death toll at 97, with no confirmed deaths on the ground.
Army and civil service personnel cleared up the rubble in the Karachi neighborhood on Saturday, helping residents whose homes had been damaged.
"Rescue Op in progress … 25 affected houses have been cleared and their residents have been moved to different locations with the support of civil administration," the army said on Twitter.
Pakistan only resumed domestic flights last week that it had suspended due to the COVID-19 pandemic. Many people traveled for the Muslim holiday Eid al-Fitr, which is expected to fall in the country on Sunday or Monday.
The Friday crash is the worst air disaster in Pakistan since 2012 when a Bhoja Air passenger plane, a Boeing 737, crashed in Islamabad and killed 127 people.
(Except for the headline, this story was not edited by NDTV staff and published from a syndicated feed.)