PA28 instructor initiates evasive maneuver to avoid C310 on straight-in approach to laf.

Attributes
ACN	497930
Time
Date	200101
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : laf.airport
State Reference	IN
Altitude	agl bound lower : 800 agl bound upper : 1400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : laf.tower
Operator	general aviation : instructional
Make Model Name	PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Flight Plan	None
Aircraft 2
Controlling Facilities	tower : laf.tower
Operator	general aviation : personal
Make Model Name	Cessna 310/T310C
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : straight in
Person 1
Affiliation	other
Function	instruction : instructor oversight : pic
Qualification	pilot : cfi pilot : commercial pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 20 flight time total : 650 flight time type : 106
ASRS Report	497930
Person 2
Affiliation	other
Function	instruction : trainee
Qualification	pilot : student
Events
Anomaly	conflict : airborne critical conflict : nmac inflight encounter : birds non adherence : clearance other spatial deviation
Independent Detector	other flight crewa other other : 2
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 300 vertical : 100
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On a training flight, a student and I were practicing takeoffs and lndgs. We were on the left downwind to runway 10 when the tower advised us that we were #2, following a cherokee on the opposite downwind. We had the traffic in sight and advised the tower. We were then cleared for the option. Meanwhile, the C310 called inbound 4.9 mi northwest. The tower advised the pilot to report 2 mi northwest for left traffic runway 10. As the #1 cherokee traffic passed abeam us on final, we turned left base. Once established on base, my student and I both noticed the C310 on final and on a collision course with us. I took control of the aircraft and entered a rapid descent. We continued on a heading perpendicular to final as we descended. The C310 passed about 100 ft above us and about 300 ft behind.

Original NASA ASRS Text

Title: PA28 INSTRUCTOR INITIATES EVASIVE MANEUVER TO AVOID C310 ON STRAIGHT-IN APCH TO LAF.

Narrative: ON A TRAINING FLT, A STUDENT AND I WERE PRACTICING TKOFS AND LNDGS. WE WERE ON THE L DOWNWIND TO RWY 10 WHEN THE TWR ADVISED US THAT WE WERE #2, FOLLOWING A CHEROKEE ON THE OPPOSITE DOWNWIND. WE HAD THE TFC IN SIGHT AND ADVISED THE TWR. WE WERE THEN CLRED FOR THE OPTION. MEANWHILE, THE C310 CALLED INBOUND 4.9 MI NW. THE TWR ADVISED THE PLT TO RPT 2 MI NW FOR L TFC RWY 10. AS THE #1 CHEROKEE TFC PASSED ABEAM US ON FINAL, WE TURNED L BASE. ONCE ESTABLISHED ON BASE, MY STUDENT AND I BOTH NOTICED THE C310 ON FINAL AND ON A COLLISION COURSE WITH US. I TOOK CTL OF THE ACFT AND ENTERED A RAPID DSCNT. WE CONTINUED ON A HDG PERPENDICULAR TO FINAL AS WE DSNDED. THE C310 PASSED ABOUT 100 FT ABOVE US AND ABOUT 300 FT BEHIND.

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.