T-45C instructor on an IFR flight plan; experiences a near midair collision with a be-35 at 8;500 fe...

Attributes
ACN	1254248
Time
Date	201504
Local Time Of Day	1201-1800
Place
Locale Reference	TYS.TRACON
State Reference	TN
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	T45 (or T2C) Goshawk
Flight Phase	Initial Approach
Route In Use	Other HI-TACAN RWY 23R
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Commercial Flight Crew Flight Instructor Flight Crew Instrument
Experience	Flight Crew Last 90 Days 93 Flight Crew Total 1500 Flight Crew Type 710
Events
Anomaly	Conflict NMAC
Miss Distance	Horizontal 100 Vertical 400

Narrative:

While executing hi-TACAN runway 23R approach into knoxville/mcghee tyson (tys); we experienced a near mid-air collision with a co-altitude beechcraft bonanza; passing from 9[o'clock] to 3[o'clock]relative bearing. We were established 3 nm north of the IAF (millz) at FL130 and cleared for the hi-TACAN approach into tys. Eight minutes later; while passing 8;500 MSL for 6;000 MSL on course; we merged with a light civil aircraft which flew directly overhead creating a less than 500 ft pass. Immediately thereafter; ATC supervisor communicated to us converging VFR traffic; less than 1 mile; and co-altitude at which point the bonanza was no longer a factor. We replied acknowledging a less than 500 ft pass had just occurred prior to their report. Luckily; a collision was avoided by pure chance alone despite IFR status and clearance.

Original NASA ASRS Text

Title: T-45C instructor on an IFR flight plan; experiences a NMAC with a BE-35 at 8;500 feet during the HI-TACAN Runway 23R approach to TYS. ATC advises the reporter of the conflict after the BE-35 had passed.

Narrative: While executing HI-TACAN RWY 23R approach into Knoxville/McGhee Tyson (TYS); we experienced a near mid-air collision with a co-altitude Beechcraft Bonanza; passing from 9[o'clock] to 3[o'clock]relative bearing. We were established 3 nm North of the IAF (MILLZ) at FL130 and cleared for the HI-TACAN approach into TYS. Eight minutes later; while passing 8;500 MSL for 6;000 MSL on course; we merged with a light civil aircraft which flew directly overhead creating a less than 500 ft pass. Immediately thereafter; ATC Supervisor communicated to us converging VFR traffic; less than 1 mile; and co-altitude at which point the Bonanza was no longer a factor. We replied acknowledging a less than 500 ft pass had just occurred prior to their report. Luckily; a collision was avoided by pure chance alone despite IFR status and clearance.

Data retrieved from NASA's ASRS site 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.

T-45C instructor on an IFR flight plan; experiences a near midair collision with a be-35 at 8;500 feet during the hi-TACAN runway 23R approach to tys. ATC advises the reporter of the conflict after the be-35 had passed.