A PA28 on landing veered to the right. Full left rudder to remain on runway. Found right main wheel ...

Attributes
ACN	636760
Time
Date	200411
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior
Operating Under FAR Part	Part 91
Flight Plan	None
Aircraft 2
Flight Phase	landing : roll
Person 1
Affiliation	other
Function	instruction : instructor oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : cfi pilot : multi engine
Experience	flight time last 90 days : 250 flight time total : 775
ASRS Report	636760
Person 2
Affiliation	other
Function	instruction : trainee
Events
Anomaly	aircraft equipment problem : critical ground encounters other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact
Consequence	other other other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft Chart Or Publication
Primary Problem	Aircraft

Narrative:

My student and I were coming back to ZZZ airport from practicing maneuvers (private pilot). We came back and practiced lndgs doing touch-and-goes on runway 33 at ZZZ. We did 2 and on our third one we made our approach for runway 33. My student started to flare and it was a little higher than normal and landed. We touched down a little hard, but nothing to be worried about. As we touched down the plane began to veer to the right. I took controls and applied left rudder to maintain direction on the runway and pulled back on the controls to slow us down. When help came, we got out and saw that the right main wheel was turned to the right and the strut had raised. The next day I found out from our mechanics at the school that we had broken the main casting of the right main landing gear as we touched down causing the right main to cant to the right about 45 degrees. After that, they also told me that there was a service bulletin from piper about this same problem that they did not know about. The service bulletin number is 1131 and was issued on aug/tue/03. I now know that in a piper aircraft that if these cracks are established that the cast of the gear can fail and to also check service bulletins on my own and not what the mechanics show me. They are correcting this problem by replacing the casting on both sides and inspection of all the other piper aircraft. Callback conversation with reporter revealed the following information: the reporter stated the cause of the aircraft veering to the right on landing roll was the failure of the right main gear casting. The reporter said the casting was the subject of a piper service bulletin 1131 that gave instructions for inspecting the casting for cracks and replacing the casting with a forging. The reporter stated this is now being done in all the PA28 aircraft at the school. The reporter said the damage was limited to the failed landing gear casting with no injuries.

Original NASA ASRS Text

Title: A PA28 ON LNDG VEERED TO THE R. FULL L RUDDER TO REMAIN ON RWY. FOUND R MAIN WHEEL TURNED TO R AND STRUT RAISED. R MAIN GEAR CASTING FOUND BROKEN.

Narrative: MY STUDENT AND I WERE COMING BACK TO ZZZ ARPT FROM PRACTICING MANEUVERS (PVT PLT). WE CAME BACK AND PRACTICED LNDGS DOING TOUCH-AND-GOES ON RWY 33 AT ZZZ. WE DID 2 AND ON OUR THIRD ONE WE MADE OUR APCH FOR RWY 33. MY STUDENT STARTED TO FLARE AND IT WAS A LITTLE HIGHER THAN NORMAL AND LANDED. WE TOUCHED DOWN A LITTLE HARD, BUT NOTHING TO BE WORRIED ABOUT. AS WE TOUCHED DOWN THE PLANE BEGAN TO VEER TO THE R. I TOOK CTLS AND APPLIED L RUDDER TO MAINTAIN DIRECTION ON THE RWY AND PULLED BACK ON THE CTLS TO SLOW US DOWN. WHEN HELP CAME, WE GOT OUT AND SAW THAT THE R MAIN WHEEL WAS TURNED TO THE R AND THE STRUT HAD RAISED. THE NEXT DAY I FOUND OUT FROM OUR MECHS AT THE SCHOOL THAT WE HAD BROKEN THE MAIN CASTING OF THE R MAIN LNDG GEAR AS WE TOUCHED DOWN CAUSING THE R MAIN TO CANT TO THE R ABOUT 45 DEGS. AFTER THAT, THEY ALSO TOLD ME THAT THERE WAS A SVC BULLETIN FROM PIPER ABOUT THIS SAME PROB THAT THEY DID NOT KNOW ABOUT. THE SVC BULLETIN NUMBER IS 1131 AND WAS ISSUED ON AUG/TUE/03. I NOW KNOW THAT IN A PIPER ACFT THAT IF THESE CRACKS ARE ESTABLISHED THAT THE CAST OF THE GEAR CAN FAIL AND TO ALSO CHK SVC BULLETINS ON MY OWN AND NOT WHAT THE MECHS SHOW ME. THEY ARE CORRECTING THIS PROB BY REPLACING THE CASTING ON BOTH SIDES AND INSPECTION OF ALL THE OTHER PIPER ACFT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE CAUSE OF THE ACFT VEERING TO THE R ON LNDG ROLL WAS THE FAILURE OF THE R MAIN GEAR CASTING. THE RPTR SAID THE CASTING WAS THE SUBJECT OF A PIPER SVC BULLETIN 1131 THAT GAVE INSTRUCTIONS FOR INSPECTING THE CASTING FOR CRACKS AND REPLACING THE CASTING WITH A FORGING. THE RPTR STATED THIS IS NOW BEING DONE IN ALL THE PA28 ACFT AT THE SCHOOL. THE RPTR SAID THE DAMAGE WAS LIMITED TO THE FAILED LNDG GEAR CASTING WITH NO INJURIES.

Data retrieved from NASA's ASRS site as of July 2007 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 on landing veered to the right. Full left rudder to remain on runway. Found right main wheel turned to right and strut raised. Right main gear casting found broken.