The preliminary report from the National Transportation Safety Board (NTSB) into the September 29 Citation CJ2 crash at Santa Monica revealed few answers to the real questions on investigators’ minds, like possible causes of the fatal accident.

What investigators do know is that weather at the time of the accident (6:20 p.m.) was VFR and that nothing seemed unusual until the aircraft landed near the right edge of Runway 21, then veered off to the north at the 1,000-feet-remaining sign and struck a hangar support beam that brought the building down on the aircraft. A fire quickly engulfed the aircraft, killing the private pilot and his three passengers. The CJ2 was operating under Part 91 flight rules at the time of the accident.

On-scene examination of the wreckage revealed no airplane debris on the runway. The NTSB said the three landing gear tires were inflated properly and exhibited no unusual wear patterns. The FAA tower controller said the pilot did not report any problems before or during the landing.