Large transport climbs 450 ft above assigned altitude in response to a TCASII RA.

Attributes
ACN	234154
Time
Date	199302
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : lga
State Reference	NY
Altitude	msl bound lower : 10000 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 2500 flight time type : 200
ASRS Report	234154
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : atp
Experience	flight time last 90 days : 180 flight time total : 8000 flight time type : 3000
ASRS Report	233435
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : required legal separation non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 300 vertical : 900
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

At cruise (10000 ft MSL) we received a TCASII TA immediately followed by an RA advising us to climb. At the same time ATC was calling traffic that should be stopping at 9000 ft. We could not visually confirm his call so we followed TCASII with a gradual climb to 10400 ft before TCASII indicated clear, notifying ATC that we followed a TCASII warning/conflict and we were returning to 10000 ft.

Original NASA ASRS Text

Title: LGT CLBS 450 FT ABOVE ASSIGNED ALT IN RESPONSE TO A TCASII RA.

Narrative: AT CRUISE (10000 FT MSL) WE RECEIVED A TCASII TA IMMEDIATELY FOLLOWED BY AN RA ADVISING US TO CLB. AT THE SAME TIME ATC WAS CALLING TFC THAT SHOULD BE STOPPING AT 9000 FT. WE COULD NOT VISUALLY CONFIRM HIS CALL SO WE FOLLOWED TCASII WITH A GRADUAL CLB TO 10400 FT BEFORE TCASII INDICATED CLR, NOTIFYING ATC THAT WE FOLLOWED A TCASII WARNING/CONFLICT AND WE WERE RETURNING TO 10000 FT.

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.