<< >> NASA ASRS Report 124960, October 1989

Aircraft climbed above assigned altitude resulting in less than standard separation with another aircraft.

Attributes
ACN	124960
Time
Date	198910
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : sbn
State Reference	IN
Altitude	msl bound lower : 27000 msl bound upper : 28000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	124960
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : overshoot non adherence : clearance non adherence : required legal separation
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance
Consequence	Other
Miss Distance	horizontal : 18000 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Aircraft #1 in level flight at FL280 nwbnd. Aircraft #2 cleared to climb and maintain FL270 eastbound. Mode C readout of aircraft #2 showed FL280 approximately 5 NM northwest of aircraft #1. Aircraft #1 was vectored left, aircraft #2 was vectored left and told to expedite climb to FL290. It appears to be pilot error by aircraft #2. Review of audio tapes show aircraft #2 cleared to FL270 and read clearance.

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Original NASA ASRS Text

Title: ACFT CLIMBED ABOVE ASSIGNED ALT RESULTING IN LESS THAN STANDARD SEPARATION WITH ANOTHER ACFT.

Narrative: ACFT #1 IN LEVEL FLT AT FL280 NWBND. ACFT #2 CLRED TO CLIMB AND MAINTAIN FL270 EBND. MODE C READOUT OF ACFT #2 SHOWED FL280 APPROX 5 NM NW OF ACFT #1. ACFT #1 WAS VECTORED LEFT, ACFT #2 WAS VECTORED LEFT AND TOLD TO EXPEDITE CLIMB TO FL290. IT APPEARS TO BE PLT ERROR BY ACFT #2. REVIEW OF AUDIO TAPES SHOW ACFT #2 CLRED TO FL270 AND READ CLRNC.

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.