Flight crew of large transport made altitude deviation to accommodate TCASII RA.

Attributes
ACN	197609
Time
Date	199112
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : lga
State Reference	NY
Altitude	msl bound lower : 11000 msl bound upper : 11300
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : n90 tower : cle
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent : approach
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : atp pilot : commercial
Experience	flight time last 90 days : 25 flight time total : 2500 flight time type : 25
ASRS Report	197609
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : ground less severe non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Miss Distance	vertical : 800
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Near somto intersection, controller reported VFR traffic at 10500. We were at 11000. TCASII commanded a climb which we performed. We deviated by about 200-300 ft and immediately returned to altitude when clear of conflict.

Original NASA ASRS Text

Title: FLC OF LGT MADE ALTDEV TO ACCOMMODATE TCASII RA.

Narrative: NEAR SOMTO INTXN, CTLR RPTED VFR TFC AT 10500. WE WERE AT 11000. TCASII COMMANDED A CLB WHICH WE PERFORMED. WE DEVIATED BY ABOUT 200-300 FT AND IMMEDIATELY RETURNED TO ALT WHEN CLR OF CONFLICT.

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.