Pakistan is observing a day of mourning following the plane crash yesterday.
All 152 people on board the flight from Karachi died when the aircraft crashed into hills outside Islamabad.
Investigators are looking for the data recorder to try to establish what caused the worst air disaster in that country.
The Airbus 321 which belonged to private airline AirBlue crashed yesterday into a steep and heavily-wooded hillside shortly before it was due to land.
Thick fog and rainy weather are considered the most likely reasons for the disaster.
