A PA28 instructor reported that after a firm landing the aircraft's right strut bent backward 90 deg...

Attributes
ACN	948763
Time
Date	201105
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	PA-28 Cherokee/Archer/Dakota/Pillan/Warrior
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	None
Flight Plan	None
Component
Aircraft Component	Main Gear
Person 1
Function	Instructor Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Flight Instructor Flight Crew Commercial Flight Crew Instrument
Experience	Flight Crew Last 90 Days 165.2 Flight Crew Total 1514.3 Flight Crew Type 1118.9
Events
Anomaly	Aircraft Equipment Problem Critical Inflight Event / Encounter Loss Of Aircraft Control

Narrative:

My student and I were in the traffic pattern practicing commercial power off 180 degree landings. On our last landing we touched down flat and firm and the right main gear strut bent backwards 90 degrees. I have had students land airplanes of the same make and model harder than our landing with no issues. Inspection of the runway showed skid marks from the right main wheel from the touchdown point to the point where the aircraft ended up. I believe the wheel may have locked or might not have been turning freely and could have caused the issue. Upon being towed off the runway; the wheel was not touching the underside of the aircraft but appeared to be having trouble turning and was continuing to leave a mark as it was towed.

Original NASA ASRS Text

Title: A PA28 Instructor reported that after a firm landing the aircraft's right strut bent backward 90 degrees and required that the aircraft be towed off the runway.

Narrative: My student and I were in the traffic pattern practicing commercial power off 180 degree landings. On our last landing we touched down flat and firm and the right main gear strut bent backwards 90 degrees. I have had students land airplanes of the same make and model harder than our landing with no issues. Inspection of the runway showed skid marks from the right main wheel from the touchdown point to the point where the aircraft ended up. I believe the wheel may have locked or might not have been turning freely and could have caused the issue. Upon being towed off the runway; the wheel was not touching the underside of the aircraft but appeared to be having trouble turning and was continuing to leave a mark as it was towed.

Data retrieved from NASA's ASRS site as of April 2012 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.

A PA28 instructor reported that after a firm landing the aircraft's right strut bent backward 90 degrees and required that the aircraft be towed off the runway.