Instructor with student pilot mis-hears ground control. Crosses runway with aircraft on takeoff roll...

Attributes
ACN	205067
Time
Date	199203
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : poc
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	ground : holding
Flight Plan	None
Aircraft 2
Make Model Name	Small Aircraft, Low Wing, 2 Eng, Retractable Gear
Flight Phase	climbout : takeoff
Person 1
Affiliation	Other
Function	instruction : instructor
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 100 flight time total : 640 flight time type : 300
ASRS Report	205067
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : student
Events
Anomaly	conflict : ground critical incursion : runway non adherence : clearance
Independent Detector	other controllera
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 100 vertical : 150
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was instructed to hold short of runway 26L at intersection 'east' at brackett airport la verne. After waiting about 1 min, my student and I were discussing our lesson which had just occurred when we heard a clearance to cross a runway and to contact ground on the south side. Thinking this clearance was for us, my student applied power and began crossing the runway. At this time, the local controller told us to stop, however we were already halfway across the runway. Looking to my left and observed a small aircraft approaching us. At the time, he was about 800 ft to the east of us. Seeing the approaching small aircraft I applied full power and exited the runway before the small aircraft reached my position. The small aircraft was on a takeoff roll and was already at vr when I crossed 26L. His last radio statement was 'no problem, we'll just fly over him.' after this, I called the tower. In my opinion, this was a simple misinterp of ATC communication. When instructor/student are talking in the cockpit, it is easy to interpret communication intended for another aircraft to be similar to what you should receive. Also, there was some noise on the frequency, further adding to the confusion.

Original NASA ASRS Text

Title: INSTRUCTOR WITH STUDENT PILOT MIS-HEARS GND CTL. CROSSES RWY WITH ACFT ON TKOF ROLL.

Narrative: I WAS INSTRUCTED TO HOLD SHORT OF RWY 26L AT INTXN 'E' AT BRACKETT ARPT LA VERNE. AFTER WAITING ABOUT 1 MIN, MY STUDENT AND I WERE DISCUSSING OUR LESSON WHICH HAD JUST OCCURRED WHEN WE HEARD A CLRNC TO CROSS A RWY AND TO CONTACT GND ON THE SOUTH SIDE. THINKING THIS CLRNC WAS FOR US, MY STUDENT APPLIED PWR AND BEGAN XING THE RWY. AT THIS TIME, THE LCL CTLR TOLD US TO STOP, HOWEVER WE WERE ALREADY HALFWAY ACROSS THE RWY. LOOKING TO MY L AND OBSERVED A SMA APCHING US. AT THE TIME, HE WAS ABOUT 800 FT TO THE E OF US. SEEING THE APCHING SMA I APPLIED FULL PWR AND EXITED THE RWY BEFORE THE SMA REACHED MY POS. THE SMA WAS ON A TKOF ROLL AND WAS ALREADY AT VR WHEN I CROSSED 26L. HIS LAST RADIO STATEMENT WAS 'NO PROBLEM, WE'LL JUST FLY OVER HIM.' AFTER THIS, I CALLED THE TWR. IN MY OPINION, THIS WAS A SIMPLE MISINTERP OF ATC COM. WHEN INSTRUCTOR/STUDENT ARE TALKING IN THE COCKPIT, IT IS EASY TO INTERPRET COM INTENDED FOR ANOTHER ACFT TO BE SIMILAR TO WHAT YOU SHOULD RECEIVE. ALSO, THERE WAS SOME NOISE ON THE FREQ, FURTHER ADDING TO THE CONFUSION.

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.