Operator error between air carrier X and military Y.

Attributes
ACN	281042
Time
Date	199408
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : eri
State Reference	PA
Altitude	msl bound lower : 24000 msl bound upper : 24000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar other personnel other
Qualification	controller : non radar
ASRS Report	281042
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	non adherence : required legal separation non adherence : published procedure
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 22800 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Climbing altitude was amended to maintain FL230 for an overflt at FL240 swbound. Pilot readback FL280 and the readback was missed. Aircraft was observed out of FL233 and told to maintain FL230.

Original NASA ASRS Text

Title: OPERATOR ERROR BTWN ACR X AND MIL Y.

Narrative: CLBING ALT WAS AMENDED TO MAINTAIN FL230 FOR AN OVERFLT AT FL240 SWBOUND. PLT READBACK FL280 AND THE READBACK WAS MISSED. ACFT WAS OBSERVED OUT OF FL233 AND TOLD TO MAINTAIN FL230.

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.