The rear wheels, called the undercarriages, opened before the landing but the opening of the left undercarriage was not indicated in the cockpit.
The pilots of the plane informed the air control tower, prompting an emergency at the airport. The fire department was also alerted and the plane was landed in the emergency field. All the passengers remained safe.
The aircraft, Boeing 737, was carrying around 45 passengers from Islamabad to Multan. The plane was further Karachi-bound with 118 passengers.
On landing, the plane was refuelled and serviced to fix the problem before taking off for Karachi.