Large transport level off on step climb receives TCASII RA. Responds.

Attributes
ACN	212715
Time
Date	199206
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : lga
State Reference	NY
Altitude	msl bound lower : 7500 msl bound upper : 8000
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90
Operator	common carrier : air carrier
Make Model Name	Large Transport
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : instrument
Experience	flight time last 90 days : 180 flight time total : 14000
ASRS Report	212715
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude altitude deviation : undershoot non adherence : far non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Our flight departed lga and we were working ny departure en route to white intersection. ATC advised that we had VFR traffic 500 ft above our level off altitude. As we crossed under the traffic (which we did not see), our TCASII announced, 'monitor vertical speed.' the PIC elected to descend approximately 500 ft until we were clear of the conflict. We then climbed back to our assigned altitude. We did not inform the controller of the evasive action in a timely fashion.

Original NASA ASRS Text

Title: LGT LEVEL OFF ON STEP CLB RECEIVES TCASII RA. RESPONDS.

Narrative: OUR FLT DEPARTED LGA AND WE WERE WORKING NY DEP ENRTE TO WHITE INTXN. ATC ADVISED THAT WE HAD VFR TFC 500 FT ABOVE OUR LEVEL OFF ALT. AS WE CROSSED UNDER THE TFC (WHICH WE DID NOT SEE), OUR TCASII ANNOUNCED, 'MONITOR VERT SPD.' THE PIC ELECTED TO DSND APPROX 500 FT UNTIL WE WERE CLR OF THE CONFLICT. WE THEN CLBED BACK TO OUR ASSIGNED ALT. WE DID NOT INFORM THE CTLR OF THE EVASIVE ACTION IN A TIMELY FASHION.

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.