Narrative:

We did an in depth pre-flight of the aircraft prior to takeoff. [During] the taxi out; we felt no shakes or rattling of the gear on the airplane. We did our run up before takeoff and everything there seemed normal also. We took off normally and got vectored for our first practice approach. Upon intercepting the approach course we started the approach. Before we crossed the final approach fix we did our pre-landing checklist; upon putting the first notch of flaps in we heard a bang. My instructor then took the controls and dropped the flaps thinking it was a flap issue. We kept hearing the bang and looked out the right window of the cockpit to see our right main gear flapping in the wind and hitting the flap. My instructor [urgently notified] tower and took us in for a landing. He put it down on the runway and rode it out as far as he could on the two remaining wheels until we were yawed into the grass off the runway. The aircraft skidded and came to a stop in the grass.

Google
 

Original NASA ASRS Text

Title: PA28 instructor with student experience a loud bang when the first increment of flaps is selected during approach. The instructor takes control and retracts the flaps but the banging continues. It is then noticed that the right main gear is hanging by its brake line. The approach is continued to landing and the aircraft skids off the runway when the right wing can no longer be held up.

Narrative: We did an in depth pre-flight of the aircraft prior to takeoff. [During] the taxi out; we felt no shakes or rattling of the gear on the airplane. We did our run up before takeoff and everything there seemed normal also. We took off normally and got vectored for our first practice approach. Upon intercepting the approach course we started the approach. Before we crossed the final approach fix we did our pre-landing checklist; upon putting the first notch of flaps in we heard a bang. My instructor then took the controls and dropped the flaps thinking it was a flap issue. We kept hearing the bang and looked out the right window of the cockpit to see our right main gear flapping in the wind and hitting the flap. My instructor [urgently notified] tower and took us in for a landing. He put it down on the runway and rode it out as far as he could on the two remaining wheels until we were yawed into the grass off the runway. The aircraft skidded and came to a stop in the grass.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.