Event Summary
During the initial climb after departure, the pilot noticed an unusual odor coming from the exhaust system and experienced an engine surge. In response, the pilot switched fuel tanks and returned to the departure point for landing.
Post-Event Inspection
After landing, the pilot and a mechanic examined the aircraft and concluded that the smell originated from cleaning solvent that had been applied to the exhaust system. The pilot subsequently started the engine and performed ground checks, which were completed without issue.
Second Incident
During the subsequent takeoff, while climbing through approximately 400 feet above ground level, the engine began to lose power. The pilot again detected the same odor from the exhaust system.
Forced Landing
The pilot executed a forced landing in rough, uneven desert brush terrain. During the landing, the main landing gear collapsed, and the aircraft slid for about 120 feet. It then spun around, struck a vehicle, and came to rest.
Post-Accident Findings
Examination of the aircraft revealed physical evidence that the exhaust system had been leaking. Additionally, a bundle of electrical system wires near the fuel pump exhibited fire damage.