Incident Summary
On 24 August 2016, a Boeing 737-400 operated by Enter Air experienced an indication of low pressure from the forward main fuel tank No. 2. The aircraft had been pushed back from its parking position and the engines were started at 03:09 UTC. Shortly after engine start, the LOW PRESSURE FWD FUEL MAIN TANK 2 warning light illuminated. The crew attempted to reset the associated fuel pump by cycling it on and off multiple times. Each time, the normal indication lasted approximately 30 seconds before the warning light reappeared. Consequently, the crew decided to return the aircraft to the parking stand. The captain made an entry in the aircraft technical log and notified the operator's maintenance control center (MCC).
Maintenance Actions
Upon arrival at the stand, maintenance personnel inspected the aircraft and identified the cause as a malfunctioning fuel pump in the No. 2 forward main tank. The aircraft was released for continued operation under the provisions of Minimum Equipment List (MEL) item 28.1.1.2, which allows dispatch with the inoperative pump. The faulty pump was later replaced during a pre-lease inspection for the lessor.
Occupants and Injuries
The aircraft carried 143 occupants. According to the report, there were no injuries—neither fatal, serious, nor minor—among the occupants.
Probable Cause
The investigating entity determined the probable cause to be a malfunction of the fuel pump of the front main fuel tank No. 2.