An air carrier turbojet in a holding pattern is mistakenly descended through the altitude of a B737.

Attributes
ACN	591469
Time
Date	200308
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	intersection : nakes
State Reference	OH
Altitude	msl bound lower : 18000 msl bound upper : 19000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob.artcc
Operator	common carrier : air carrier
Make Model Name	B737-800
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	descent : holding
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zob.artcc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent : holding
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : cfi pilot : atp pilot : multi engine
Experience	flight time last 90 days : 150 flight time total : 6000 flight time type : 700
ASRS Report	591469
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : nmac conflict : airborne critical non adherence : published procedure non adherence : required legal separation
Independent Detector	atc equipment other atc equipment : radar mode c aircraft equipment : tcas
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 1500 vertical : 200
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

While holding over nakes intersection at FL180 the controller cleared an airline jet to descend through our altitude. He was holding at FL190. He descended into us and we received an RA. I maneuvered the aircraft to avoid him. Center fessed up and admitted that he had mistakenly cleared aircraft Y to descend through our altitude.

Original NASA ASRS Text

Title: AN ACR TURBOJET IN A HOLDING PATTERN IS MISTAKENLY DSNDED THROUGH THE ALT OF A B737.

Narrative: WHILE HOLDING OVER NAKES INTXN AT FL180 THE CTLR CLRED AN AIRLINE JET TO DSND THROUGH OUR ALT. HE WAS HOLDING AT FL190. HE DSNDED INTO US AND WE RECEIVED AN RA. I MANEUVERED THE ACFT TO AVOID HIM. CTR FESSED UP AND ADMITTED THAT HE HAD MISTAKENLY CLRED ACFT Y TO DSND THROUGH OUR ALT.

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.