The instructor and student pilots aboard a C-414 ran momentarily off the taxiway while both were mon...

Narrative:

The event took place during taxiing after a long lesson in cessna 414 'chancellor' at an uncontrolled airport. We were taxiing slowly on the long taxiway parallel the runway when we heard radio transmissions from a mooney that was on final. The pilot in the mooney was saying that someone was ahead of him on short final. My student and I had an earlier understanding that he would be taxiing all the time. I was the instructor; but was not controlling the aircraft as part of the lesson plan was to let him learn to control it on the ground. When we heard the transmission from mooney on final; I looked up and saw that there really was a single engine C-172 that turned final in front of the mooney; thus cutting the mooney short. The cessna did not transmit at all. The pilot in the mooney said; 'looks like someone is in front of me on final.' I immediately got on the radio and said; 'yes; mooney; it looks like someone is in front of you.'while I talked with the pilot of mooney; my mind was preoccupied with the possibility of a dangerous situation on short final. I thought my student was taxiing the airplane. All the while my student was also paying attention to the same situation on final and thought that I was taxiing. This resulted in our aircraft taxiing partially off the pavement and the left propeller striking the unpaved surface just off the taxiway. When I saw aircraft taxiing off the paved surface; I immediately increased power to the left engine and stepped on the right rudder pedal and the aircraft returned onto the paved taxiway. We stopped and visually inspected the propeller for damages. We found a few nicks on two blades and a minor dent on one of the tips. No further damage was noted. The airplane was referred to maintenance for repairs.

Original NASA ASRS Text

Title: The Instructor and student pilots aboard a C-414 ran momentarily off the taxiway while both were monitoring traffic to their runway of intended departure at an uncontrolled airport. Minor damage to the left propeller blades resulted.

Narrative: The event took place during taxiing after a long lesson in Cessna 414 'Chancellor' at an uncontrolled airport. We were taxiing slowly on the long taxiway parallel the runway when we heard radio transmissions from a Mooney that was on final. The pilot in the Mooney was saying that someone was ahead of him on short final. My student and I had an earlier understanding that he would be taxiing all the time. I was the Instructor; but was not controlling the aircraft as part of the lesson plan was to let him learn to control it on the ground. When we heard the transmission from Mooney on final; I looked up and saw that there really was a single engine C-172 that turned final in front of the Mooney; thus cutting the Mooney short. The Cessna did not transmit at all. The pilot in the Mooney said; 'Looks like someone is in front of me on final.' I immediately got on the radio and said; 'Yes; Mooney; it looks like someone is in front of you.'While I talked with the pilot of Mooney; my mind was preoccupied with the possibility of a dangerous situation on short final. I thought my student was taxiing the airplane. All the while my student was also paying attention to the same situation on final and thought that I was taxiing. This resulted in our aircraft taxiing partially off the pavement and the left propeller striking the unpaved surface just off the taxiway. When I saw aircraft taxiing off the paved surface; I immediately increased power to the left engine and stepped on the right rudder pedal and the aircraft returned onto the paved taxiway. We stopped and visually inspected the propeller for damages. We found a few nicks on two blades and a minor dent on one of the tips. No further damage was noted. The airplane was referred to Maintenance for repairs.

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.

Attributes
ACN	983551
Time
Date	201112
Local Time Of Day	1201-1800
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Chancellor 414A & C414
Operating Under FAR Part	Part 91
Flight Phase	Taxi
Flight Plan	None
Person 1
Function	Instructor
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 70 Flight Crew Total 2600 Flight Crew Type 70
Events
Anomaly	Ground Event / Encounter Loss Of Aircraft Control Ground Excursion Taxiway

The instructor and student pilots aboard a C-414 ran momentarily off the taxiway while both were monitoring traffic to their runway of intended departure at an uncontrolled airport. Minor damage to the left propeller blades resulted.