Near midair collision.

Attributes
ACN	280583
Time
Date	199408
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lhc
State Reference	TN
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mem
Operator	other
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	other : unknown
Navigation In Use	Other Other
Flight Phase	cruise other
Flight Plan	VFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Plan	VFR
Person 1
Affiliation	government other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 11000 flight time type : 3500
ASRS Report	280583
Person 2
Affiliation	government other
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 55 flight time total : 3800 flight time type : 1400
ASRS Report	280681
Events
Anomaly	non adherence : far non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 200 vertical : 50
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were conducting an airborne flight inspection certification of the arlington, tn, localizer. The prescribed maneuver for this check was a 10 NM arc across the localizer course at 2000 ft MSL. It was while on the arc that the near miss occurred. We were level at 2000 ft MSL and on an easterly heading. The captain saw the other aircraft at the same altitude, heading north. He pushed hard on the yoke and we began a rapid descent under the other aircraft. Our TCASII was inoperative and memphis approach failed to call out the traffic conflict. We had interrupted our IFR flight plan with memphis approach to conduct this inspection under VMC conditions, and they were asked to hold our IFR flight plan open for the remainder of our flight after we completed the work at arlington. We remained on our discrete transponder code and memphis approach advised they would issue TA's. Obviously a better lookout doctrine from everyone involved would have prevented this incident from occurring.

Original NASA ASRS Text

Title: NMAC.

Narrative: WE WERE CONDUCTING AN AIRBORNE FLT INSPECTION CERTIFICATION OF THE ARLINGTON, TN, LOC. THE PRESCRIBED MANEUVER FOR THIS CHK WAS A 10 NM ARC ACROSS THE LOC COURSE AT 2000 FT MSL. IT WAS WHILE ON THE ARC THAT THE NEAR MISS OCCURRED. WE WERE LEVEL AT 2000 FT MSL AND ON AN EASTERLY HDG. THE CAPT SAW THE OTHER ACFT AT THE SAME ALT, HEADING N. HE PUSHED HARD ON THE YOKE AND WE BEGAN A RAPID DSCNT UNDER THE OTHER ACFT. OUR TCASII WAS INOP AND MEMPHIS APCH FAILED TO CALL OUT THE TFC CONFLICT. WE HAD INTERRUPTED OUR IFR FLT PLAN WITH MEMPHIS APCH TO CONDUCT THIS INSPECTION UNDER VMC CONDITIONS, AND THEY WERE ASKED TO HOLD OUR IFR FLT PLAN OPEN FOR THE REMAINDER OF OUR FLT AFTER WE COMPLETED THE WORK AT ARLINGTON. WE REMAINED ON OUR DISCRETE XPONDER CODE AND MEMPHIS APCH ADVISED THEY WOULD ISSUE TA'S. OBVIOUSLY A BETTER LOOKOUT DOCTRINE FROM EVERYONE INVOLVED WOULD HAVE PREVENTED THIS INCIDENT FROM OCCURRING.

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.