The flight was originally scheduled to fly from Newark, N.J., to Düsseldorf, Germany, before it declared mayday.
The flight was initially diverted to Halifax because of poor weather before eventually being sent to St. John’s.
The report says a single pilot landed the plane without incident at St. John’s International Airport.
Passengers on the plane say they were told by Lufthansa that the co-pilot had been taken to hospital for treatment.
Sebastion Matthes said on Twitter that he was on a flight out of St.John’s, although other passengers were going to be stuck in Newfoundland until the weekend.
Matthes also said that while he was on his way home to Germany, the plane he landed on was headed to Düsseldorf but he said “they cannot take us.”