The airport in the northeastern city of Lahore, where the flight originated, initially said there were 107 people on board but that number was later revised down to 91 passengers and seven crew members.
At least two people aboard survived, according to the health department, revising an earlier statement that three were alive.
One, Muhammad Zubair, has been describing his ordeal, recalling how he lost consciousness then woke up to smoke and screaming. So far, only two people are confirmed to have survived the tragedy. Global flights are not due to start again until May 31.
A senior civil aviation official told Reuters it appeared the plane was unable to open its wheels due to a technical fault prior to landing, but it was to early to determine the cause.
In the audiotapes, Gul could be heard calmly telling the air traffic controllers, "We have lost an engine...."More news: Valorant Will be Publicly Available in June
Airworthiness documents showed the plane last received a government check on 1 November, 2019.
Turkey and Latvia also offered condolences to Pakistan over the deadly plane crash.
The disaster comes as Pakistanis across the country are preparing to celebrate the end of Ramadan and the beginning of Eid al-Fitr, with many travelling back to their homes in cities and villages.
What happened at the crash scene?
A Pakistan International Airlines flight smashed into a residential area in Karachi on Friday following engine failure.More news: United Kingdom to set out quarantine measures for global arrivals
An Airbus A320 of the Pakistan International Airlines descends dangerously close to the houses in a densely populated residential area of Karachi, less than a kilometer from the airport where it was trying to land, and hits one of the buildings, tail first. A number of cars were set on fire.
The plane, he said, had caught fire before it fell down following a "deafening explosion". "They are nearly my neighbours, I can't tell you what a awful thing it was". Dawn News added that ambulances and rescue officials are at the scene. It is unclear if those fatalities were victims from the ground or the plane. Both were at the front of the plane.
What is Pakistan's safety record like?
Mayor Wasim Akhtar said at least five or six houses were destroyed in the crash of the domestic flight operated by Pakistan International Airlines.More news: Inflation rises in Nigeria for 8th straight month