A pilot and flight instructor reported a prop strike in a piper arrow after a touch-and-go as the ge...

Narrative:

I departed with my commercial student to go perform landings. After doing 3 landings; we requested a short approach to practice his power off 180's. After getting cleared for the approach from tower and reaching abeam our landing point; my student went power idle. As the power came out; the gear over ride deployed; extending the gear as the power went below 15' manifold pressure. At that point I realized I forgot to disengage the emergency gear over ride to practice the power off 180's. Once we realized that the gear extended; we verified we had three green. Since this was not the normal position in a power off 180 where we extend our gear; we did not put the gear in the down position. As we continued with the approach we realized that we didn't need flaps for the landing; we verified three green on final. Once we landed; we went full power for the takeoff. As we reached our normal vr speed of 70; we rotated. That was when we felt a bump and heard a skidding sound and I grabbed the controls immediately and continued the climb out. We then contacted tower asking if they saw anything on the runway; as it sounded as if our landing gear sheared off. They said they saw nothing on the runway. We continued with the climb out; that's when I went to reach for the landing gear lever; which was when I realized it was not in the down position. We proceeded with a low approach and as we put our gear in the down position; we once again had three greens and tower said everything looked good.we then departed back to [home field] in which I prepared for a soft field landing just in case something was wrong with the gear that we weren't aware of. It wasn't until taxing back to transient parking and shutting the plane down; we realized we had a prop strike.I can be more aware of everything going on in the plane rather than just relying on the indications that I'm seeing.

Original NASA ASRS Text

Title: A pilot and flight instructor reported a prop strike in a Piper Arrow after a touch-and-go as the gear retracted due to auto-extension and failure to match the landing gear handle.

Narrative: I departed with my commercial student to go perform landings. After doing 3 landings; we requested a short approach to practice his power off 180's. After getting cleared for the approach from tower and reaching abeam our landing point; my student went power idle. As the power came out; the gear over ride deployed; extending the gear as the power went below 15' manifold pressure. At that point I realized I forgot to disengage the emergency gear over ride to practice the power off 180's. Once we realized that the gear extended; we verified we had three green. Since this was not the normal position in a power off 180 where we extend our gear; we did not put the gear in the down position. As we continued with the approach we realized that we didn't need flaps for the landing; we verified three green on final. Once we landed; we went full power for the takeoff. As we reached our normal Vr speed of 70; we rotated. That was when we felt a bump and heard a skidding sound and I grabbed the controls immediately and continued the climb out. We then contacted tower asking if they saw anything on the runway; as it sounded as if our landing gear sheared off. They said they saw nothing on the runway. We continued with the climb out; that's when I went to reach for the landing gear lever; which was when I realized it was not in the down position. We proceeded with a low approach and as we put our gear in the down position; we once again had three greens and tower said everything looked good.We then departed back to [home field] in which I prepared for a soft field landing just in case something was wrong with the gear that we weren't aware of. It wasn't until taxing back to transient parking and shutting the plane down; we realized we had a prop strike.I can be more aware of everything going on in the plane rather than just relying on the indications that I'm seeing.

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.

Attributes
ACN	1335337
Time
Date	201602
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Tower
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	PA-28R Cherokee Arrow All Series
Operating Under FAR Part	Part 91
Flight Phase	Landing
Flight Plan	VFR
Component
Aircraft Component	Gear Extend/Retract Mechanism
Person 1
Function	Instructor Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Commercial Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 93.7 Flight Crew Total 800.3 Flight Crew Type 30.2
Person 2
Function	Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Private
Experience	Flight Crew Last 90 Days 27 Flight Crew Total 171 Flight Crew Type 171
Events
Anomaly	Deviation - Procedural Published Material / Policy Ground Event / Encounter Ground Strike - Aircraft

A pilot and flight instructor reported a prop strike in a piper arrow after a touch-and-go as the gear retracted due to auto-extension and failure to match the landing gear handle.