At about 16:00 eastern time, a Piper PA-34-200T was damaged during landing at Northeast Philadelphia Airport. The flight instructor and pilot were not injured. The flight instructor said the two checked the gear several times during the approach and followed the prelanding checklist. After a smooth landing, the airplane was rolling to a stop when the right main landing gear collapsed. The airplane veered to the right, and the right wing struck a runway light and the nose gear collapsed. A witness said all three wheels appeared down at the time of landing.