Flight and Landing
The pilot and one passenger were on board the airplane for a flight intended to familiarize the passenger with the airplane. The pilot was conducting landing practice. During one of the landings, the airplane touched down in a manner described by the pilot as 'firm.'
Post-Landing Observations
Following the firm landing, the pilot noticed an increase in cabin noise and a sensation of the seats being jarred. The pilot then taxied the airplane back to the hangar.
Pilot's Account
Upon inspection, the pilot reported that a fuselage tube had failed due to a 'pre-existing weakened condition.'
FAA Examination
An FAA Inspector examined the airplane and reported that the fuselage tube displayed evidence of corrosion.