Air carrier X had near midair collision with VMC small transport Y. See and avoid concept.

Attributes
ACN	163316
Time
Date	199011
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : buf
State Reference	NY
Altitude	msl bound lower : 11000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : buf
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
ASRS Report	163316
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 400
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

Air carrier X descending to FL110 10 mi west of buf advised that he had to rapidly increase his rate of descent to avoid what he reported as an small transport Y crossing his path. Prior to the incident I did not observe any traffic. It is believed small transport Y is the same one that we called ZOB on to advise we were unable to give a tour of niagara falls. The procedure of these tours can be exhaustive at best and increase workload tremendously at best.

Original NASA ASRS Text

Title: ACR X HAD NMAC WITH VMC SMT Y. SEE AND AVOID CONCEPT.

Narrative: ACR X DSNDING TO FL110 10 MI W OF BUF ADVISED THAT HE HAD TO RAPIDLY INCREASE HIS RATE OF DSNT TO AVOID WHAT HE RPTED AS AN SMT Y XING HIS PATH. PRIOR TO THE INCIDENT I DID NOT OBSERVE ANY TFC. IT IS BELIEVED SMT Y IS THE SAME ONE THAT WE CALLED ZOB ON TO ADVISE WE WERE UNABLE TO GIVE A TOUR OF NIAGARA FALLS. THE PROC OF THESE TOURS CAN BE EXHAUSTIVE AT BEST AND INCREASE WORKLOAD TREMENDOUSLY AT BEST.

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.