<< >> NASA ASRS Report 483748, August 2000

A cpr flight crew flying an MU300 near det at 18000 ft reports an near midair collision with a lear jet below their aircraft.

Attributes
ACN	483748
Time
Date	200008
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	intersection : hadak
State Reference	MI
Altitude	msl single value : 18000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob.artcc
Operator	general aviation : corporate
Make Model Name	MU-300 Diamond 1/1A
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Gates Learjet Corp Undifferentiated or Other Model
Flight Phase	cruise : level
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : multi engine
Experience	flight time last 90 days : 70 flight time total : 4000 flight time type : 1000
ASRS Report	483748
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne critical conflict : nmac non adherence : clearance non adherence : far non adherence : required legal separation
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : took precautionary avoidance action
Miss Distance	horizontal : 0 vertical : 700
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was PNF copying ATIS and listening to ATC, I looked up to see the lear cross below us/head on. I noticed the PF was 300 ft low and called altitude as the PF arrested the descent. I estimate that had we not arrested the descent that a collision was probable. No traffic alert was issued.

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Original NASA ASRS Text

Title: A CPR FLC FLYING AN MU300 NEAR DET AT 18000 FT RPTS AN NMAC WITH A LEAR JET BELOW THEIR ACFT.

Narrative: I WAS PNF COPYING ATIS AND LISTENING TO ATC, I LOOKED UP TO SEE THE LEAR CROSS BELOW US/HEAD ON. I NOTICED THE PF WAS 300 FT LOW AND CALLED ALT AS THE PF ARRESTED THE DSCNT. I ESTIMATE THAT HAD WE NOT ARRESTED THE DSCNT THAT A COLLISION WAS PROBABLE. NO TFC ALERT WAS ISSUED.

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.