<< >> NASA ASRS Report 91769, August 1988

Cpr light transport climbed through altitude of air carrier large transport that was deviating for severe WX, resulting in less than standard separation.

Attributes
ACN	91769
Time
Date	198808
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ape
State Reference	OH
Altitude	msl bound lower : 29600 msl bound upper : 31000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid artcc : zob
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller non radar : 5 controller radar : 7
ASRS Report	91769
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	none taken : insufficient time
Consequence	faa : investigated
Miss Distance	horizontal : 19200 vertical : 1400
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

A verbal point-out was given to me from cle center on aircraft #1 at FL310. The aircraft was deviating around thunderstorm near cleveland. Aircraft #2 was handed off to me at FL290 at reduced airspeed. This aircraft was vectored and climbed. Sep was lost. No alert was activated at indianapolis because only one aircraft was tracked. The alert at cle center activated. Thunderstorm are extremely difficult to work with. Aircraft deviating should always have revised routes with appropriate handoff to receiving facility.

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Original NASA ASRS Text

Title: CPR LTT CLIMBED THROUGH ALT OF ACR LGT THAT WAS DEVIATING FOR SEVERE WX, RESULTING IN LESS THAN STANDARD SEPARATION.

Narrative: A VERBAL POINT-OUT WAS GIVEN TO ME FROM CLE CTR ON ACFT #1 AT FL310. THE ACFT WAS DEVIATING AROUND TSTM NEAR CLEVELAND. ACFT #2 WAS HANDED OFF TO ME AT FL290 AT REDUCED AIRSPD. THIS ACFT WAS VECTORED AND CLBED. SEP WAS LOST. NO ALERT WAS ACTIVATED AT INDIANAPOLIS BECAUSE ONLY ONE ACFT WAS TRACKED. THE ALERT AT CLE CTR ACTIVATED. TSTM ARE EXTREMELY DIFFICULT TO WORK WITH. ACFT DEVIATING SHOULD ALWAYS HAVE REVISED ROUTES WITH APPROPRIATE HANDOFF TO RECEIVING FAC.

Data retrieved from NASA's ASRS site as of August 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.