C172 instructor pilot and student had an near midair collision with a king air at 9000 ft, 5 mi sout...

Attributes
ACN	616769
Time
Date	200405
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ril.airport
State Reference	CO
Altitude	msl single value : 9000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	other
Flight Plan	None
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Beechcraft Twin Turboprop Jet Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	descent : intermediate altitude descent : approach
Route In Use	approach : visual
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : commercial pilot : cfi pilot : instrument
Experience	flight time last 90 days : 150 flight time total : 3100 flight time type : 1000
ASRS Report	616769
Person 2
Affiliation	other
Function	instruction : trainee
Events
Anomaly	conflict : nmac non adherence : far non adherence : published procedure non adherence : required legal separation
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact none taken : insufficient time
Consequence	Other
Miss Distance	vertical : 200
Supplementary
Problem Areas	Flight Crew Human Performance Environmental Factor
Primary Problem	Flight Crew Human Performance

Narrative:

Giving instruction 5 mi southeast of ril at 9000 ft, king air called in from southeast and I made a blind report (position and altitude, conducting air work). Later, king air pilot advised that we missed by 200 ft. I never saw the aircraft. We were on 122.8. My question is: how a pilot with TCASII aboard would let a situation deteriorate to 200 ft?

Original NASA ASRS Text

Title: C172 INSTRUCTOR PLT AND STUDENT HAD AN NMAC WITH A KING AIR AT 9000 FT, 5 MI SE OF RIL.

Narrative: GIVING INSTRUCTION 5 MI SE OF RIL AT 9000 FT, KING AIR CALLED IN FROM SE AND I MADE A BLIND RPT (POS AND ALT, CONDUCTING AIR WORK). LATER, KING AIR PLT ADVISED THAT WE MISSED BY 200 FT. I NEVER SAW THE ACFT. WE WERE ON 122.8. MY QUESTION IS: HOW A PLT WITH TCASII ABOARD WOULD LET A SIT DETERIORATE TO 200 FT?

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.

C172 instructor pilot and student had an near midair collision with a king air at 9000 ft, 5 mi southeast of ril.