<< >> NASA ASRS Report 225801, November 1992

Small transport has near midair collision with second aircraft. Small transport on IFR flight plan, second aircraft apparently VFR.

Attributes
ACN	225801
Time
Date	199211
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : ckb
State Reference	WV
Altitude	msl bound lower : 7000 msl bound upper : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ckb
Operator	general aviation : corporate
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	descent other
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 100 flight time total : 6000
ASRS Report	225801
Person 2
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	other
Miss Distance	horizontal : 0 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

While flying IFR at 7000 ft under the control of clarksburg approach, in an small transport, traveling from charleston to morgantown, I overheard an aircraft advised by clarksburg approach of my position in front of and below him with only a few mi of separation. To my amazement he reported out of 7500 ft descending. Clarksburg responded to my immediate expression of extreme concern by advising the aircraft to return to 7500 ft. Despite vigilant searching I did not see him, I was unable to take evasive action. Within seconds, in a blur of motion he passed directly overhead my aircraft, which had remained level at 7000 ft, as assigned. The 'separation' was less than I have seen as a spectator at airshows. In over 20 yrs of flying I have never felt so threatened or vulnerable. I can find no fault with the air traffic controller who I suspect was as alarmed as I was at the pilot's actions. I have no explanation why he would descend towards traffic he acknowledged without having absolute visual contact. Similarly it is beyond my understanding why, if he did see me (and I have no recollection of him advising clarksburg that he did in fact have visual contact) he descended so as to cross directly overhead my aircraft at a frighteningly close distance.

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Original NASA ASRS Text

Title: SMT HAS NMAC WITH SECOND ACFT. SMT ON IFR FLT PLAN, SECOND ACFT APPARENTLY VFR.

Narrative: WHILE FLYING IFR AT 7000 FT UNDER THE CTL OF CLARKSBURG APCH, IN AN SMT, TRAVELING FROM CHARLESTON TO MORGANTOWN, I OVERHEARD AN ACFT ADVISED BY CLARKSBURG APCH OF MY POS IN FRONT OF AND BELOW HIM WITH ONLY A FEW MI OF SEPARATION. TO MY AMAZEMENT HE RPTED OUT OF 7500 FT DSNDING. CLARKSBURG RESPONDED TO MY IMMEDIATE EXPRESSION OF EXTREME CONCERN BY ADVISING THE ACFT TO RETURN TO 7500 FT. DESPITE VIGILANT SEARCHING I DID NOT SEE HIM, I WAS UNABLE TO TAKE EVASIVE ACTION. WITHIN SECONDS, IN A BLUR OF MOTION HE PASSED DIRECTLY OVERHEAD MY ACFT, WHICH HAD REMAINED LEVEL AT 7000 FT, AS ASSIGNED. THE 'SEPARATION' WAS LESS THAN I HAVE SEEN AS A SPECTATOR AT AIRSHOWS. IN OVER 20 YRS OF FLYING I HAVE NEVER FELT SO THREATENED OR VULNERABLE. I CAN FIND NO FAULT WITH THE AIR TFC CTLR WHO I SUSPECT WAS AS ALARMED AS I WAS AT THE PLT'S ACTIONS. I HAVE NO EXPLANATION WHY HE WOULD DSND TOWARDS TFC HE ACKNOWLEDGED WITHOUT HAVING ABSOLUTE VISUAL CONTACT. SIMILARLY IT IS BEYOND MY UNDERSTANDING WHY, IF HE DID SEE ME (AND I HAVE NO RECOLLECTION OF HIM ADVISING CLARKSBURG THAT HE DID IN FACT HAVE VISUAL CONTACT) HE DSNDED SO AS TO CROSS DIRECTLY OVERHEAD MY ACFT AT A FRIGHTENINGLY CLOSE DISTANCE.

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.