Air carrier medium large transport aircraft responding to a TCASII RA climbed above assigned altitude resulting in less than standard separation.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	208420
Time
Date	199204
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : alb
State Reference	NY
Altitude	msl bound lower : 23000 msl bound upper : 23600
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zbw
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Light Transport
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	208420
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : required legal separation non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Miss Distance	horizontal : 15000 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Air carrier X climbed to FL230. Aircraft Y descended by a higher sector to FL240. Aircraft X TCASII advised 'climb immediately.' when aircraft X was at 236, TCASII advised 'descend.' aircraft passed within 2.3 mi and 500 ft. Had aircraft X been 20-30 KTS slower, targets would have merged.

Original NASA ASRS Text

Title: ACR MLG ACFT RESPONDING TO A TCASII RA CLBED ABOVE ASSIGNED ALT RESULTING IN LTSS.

Narrative: ACR X CLBED TO FL230. ACFT Y DSNDED BY A HIGHER SECTOR TO FL240. ACFT X TCASII ADVISED 'CLB IMMEDIATELY.' WHEN ACFT X WAS AT 236, TCASII ADVISED 'DSND.' ACFT PASSED WITHIN 2.3 MI AND 500 FT. HAD ACFT X BEEN 20-30 KTS SLOWER, TARGETS WOULD HAVE MERGED.

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.