Near midair collision between a C172 in level ft outbound parallel to the inbound ILS approach and a B727 climbing out after takeoff and turning below and behind the C172.

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Attributes
ACN	431247
Time
Date	199903
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : bzn.airport
State Reference	MT
Altitude	msl bound lower : 7000 msl bound upper : 7300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : bzn.tower
Operator	general aviation : instructional
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Navigation In Use	other vortac
Flight Phase	cruise : level
Flight Plan	None
Aircraft 2
Controlling Facilities	tower : bzn.tower
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Route In Use	departure : vfr
Flight Plan	IFR
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : instrument pilot : multi engine pilot : cfi pilot : commercial
Experience	flight time last 90 days : 60 flight time total : 9000 flight time type : 60
ASRS Report	431247
Person 2
Affiliation	other
Function	instruction : trainee
Qualification	pilot : private
Events
Anomaly	conflict : nmac non adherence : far
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time none taken : anomaly accepted
Miss Distance	horizontal : 500 vertical : 500
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was on an instrument training flight in VMC in a C172 with a student and was inbound from the procedure turn on the bzn VOR 12 approach. About 2 mi from the airport, bzn tower advised he had an air carrier Y B727 ready for departure on runway 30 and advised by tower to terminate the approach. I acknowledged this and requested a right climbing turn outbound to manni (IAF) for executing the ILS runway 12 approach. This was approved by tower with the instruction to maintain visual separation with the air carrier Y flight and was cautioned of wake turbulence of the B727. Since the air carrier Y departed on runway 30 and was outbound on what I presumed to be the 298 degree radial, I flew parallel to the 298 degree radial an estimated 1 mi to the northwest. I had visual on the air carrier Y flight at all times until he turned left and crossed behind and below me apparently turning on course. Air carrier Y then called bzn tower and complained that I had not maintained visual separation. The air carrier Y pilot needs to review far 91.113 (B) and (F).

Original NASA ASRS Text

Title: NMAC BTWN A C172 IN LEVEL FT OUTBOUND PARALLEL TO THE INBOUND ILS APCH AND A B727 CLBING OUT AFTER TKOF AND TURNING BELOW AND BEHIND THE C172.

Narrative: I WAS ON AN INST TRAINING FLT IN VMC IN A C172 WITH A STUDENT AND WAS INBOUND FROM THE PROC TURN ON THE BZN VOR 12 APCH. ABOUT 2 MI FROM THE ARPT, BZN TWR ADVISED HE HAD AN ACR Y B727 READY FOR DEP ON RWY 30 AND ADVISED BY TWR TO TERMINATE THE APCH. I ACKNOWLEDGED THIS AND REQUESTED A R CLBING TURN OUTBOUND TO MANNI (IAF) FOR EXECUTING THE ILS RWY 12 APCH. THIS WAS APPROVED BY TWR WITH THE INSTRUCTION TO MAINTAIN VISUAL SEPARATION WITH THE ACR Y FLT AND WAS CAUTIONED OF WAKE TURB OF THE B727. SINCE THE ACR Y DEPARTED ON RWY 30 AND WAS OUTBOUND ON WHAT I PRESUMED TO BE THE 298 DEG RADIAL, I FLEW PARALLEL TO THE 298 DEG RADIAL AN ESTIMATED 1 MI TO THE NW. I HAD VISUAL ON THE ACR Y FLT AT ALL TIMES UNTIL HE TURNED L AND CROSSED BEHIND AND BELOW ME APPARENTLY TURNING ON COURSE. ACR Y THEN CALLED BZN TWR AND COMPLAINED THAT I HAD NOT MAINTAINED VISUAL SEPARATION. THE ACR Y PLT NEEDS TO REVIEW FAR 91.113 (B) AND (F).

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.