On August 11, 1996, at an unknown mountain daylight time, an Aero Commander S2R, N8992Q, was substantially damaged during a forced landing near Hatch, New Mexico. The commercial pilot, sole occupant of the airplane, was not injured. The aerial application airplane was being operated by the owner, under Title 14 CFR Part 91. The flight originated from the Hatch Municipal Airport at an unknown time. Visual meteorological conditions prevailed for the non-certificated aerial application flight for which a flight plan was not filed. The FAA inspector reported that the airplane experienced a loss of engine power and the pilot executed a forced landing on a river levee. During the landing roll out, the right wing impacted a pole resulting in structural damage to the wing and flap. There were no reported eyewitnesses to the accident. A review of the FAA files revealed that at the time of the accident the pilot's flight physical had expired. Furthermore, the pilot did not possess a Part 137 certificate for aerial application. The pilot did not return any of the several NTSB 6120.1/2 Forms that were sent to his last known address. Several telephone messages left for the pilot were unanswered and his current telephone number is unlisted.