C150 instructor and student enter runway at S36 while BE35 is on final.

Attributes
ACN	675621
Time
Date	200510
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : s36.airport
State Reference	WA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Cessna 150
Operating Under FAR Part	Part 91
Flight Phase	ground : holding ground : takeoff roll
Flight Plan	VFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Bonanza 33
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : traffic pattern approach : visual
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : multi engine pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 150 flight time total : 2250 flight time type : 100
ASRS Report	675621
Person 2
Affiliation	other
Function	instruction : trainee
Events
Anomaly	conflict : ground critical incursion : runway other spatial deviation
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : took precautionary avoidance action
Miss Distance	vertical : 100
Supplementary
Problem Areas	Airport Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

My student and I were holding short and waiting for takeoff at the airport. I had heard a bonanza in the pattern call downwind and then base. We turned and checked final and didn't see any traffic; so we made our radio call for entering the runway and takeoff. Just after crossing the hold short line; the bonanza came overhead and we promptly stopped. He landed and exited the runway and we continued onto the runway and took off. Upon questioning the bonanza pilot over the radio about the lack of an 'on final' call; he mentioned that it is not required. He also mentioned that there is nothing wrong with flying a 'dogleg base to final approach' as he had done. In all honesty on my part; my student and I were departing on his first dual cross country and we were running a bit late. When checking final; we looked at the straight-in final and upon not seeing any traffic; we decided to launch. If we had done a full 360 degree turn on the ground prior to crossing the hold short line like we normally do; I wouldn't be writing this!

Original NASA ASRS Text

Title: C150 INSTRUCTOR AND STUDENT ENTER RWY AT S36 WHILE BE35 IS ON FINAL.

Narrative: MY STUDENT AND I WERE HOLDING SHORT AND WAITING FOR TKOF AT THE ARPT. I HAD HEARD A BONANZA IN THE PATTERN CALL DOWNWIND AND THEN BASE. WE TURNED AND CHKED FINAL AND DIDN'T SEE ANY TFC; SO WE MADE OUR RADIO CALL FOR ENTERING THE RWY AND TKOF. JUST AFTER XING THE HOLD SHORT LINE; THE BONANZA CAME OVERHEAD AND WE PROMPTLY STOPPED. HE LANDED AND EXITED THE RWY AND WE CONTINUED ONTO THE RWY AND TOOK OFF. UPON QUESTIONING THE BONANZA PLT OVER THE RADIO ABOUT THE LACK OF AN 'ON FINAL' CALL; HE MENTIONED THAT IT IS NOT REQUIRED. HE ALSO MENTIONED THAT THERE IS NOTHING WRONG WITH FLYING A 'DOGLEG BASE TO FINAL APCH' AS HE HAD DONE. IN ALL HONESTY ON MY PART; MY STUDENT AND I WERE DEPARTING ON HIS FIRST DUAL XCOUNTRY AND WE WERE RUNNING A BIT LATE. WHEN CHKING FINAL; WE LOOKED AT THE STRAIGHT-IN FINAL AND UPON NOT SEEING ANY TFC; WE DECIDED TO LAUNCH. IF WE HAD DONE A FULL 360 DEG TURN ON THE GND PRIOR TO XING THE HOLD SHORT LINE LIKE WE NORMALLY DO; I WOULDN'T BE WRITING THIS!

Data retrieved from NASA's ASRS site as of January 2009 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.