A TCASII RA required evasive action climb and turn.

Attributes
ACN	308900
Time
Date	199507
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lga
State Reference	NY
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	descent other
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	308900
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : clearance other anomaly other other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 1000
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

On transition from nanci 5 arrival into lga, ATC called out traffic 10 O'clock low. Air carrier MD80 was climbing out of clouds in left turn. Its projected flight path would intersect my flight at some point ahead. I stopped my previously cleared descent to 7000 ft and leveled. When RA sounded, 'climb, traffic, climb,' I started climb and banked the aircraft to keep traffic in sight. Traffic leveled off approximately 1000 ft below and went directly under me. I took evasive action to ensure sufficient separation, since I did not know if other airplane was going to level below me.

Original NASA ASRS Text

Title: A TCASII RA REQUIRED EVASIVE ACTION CLB AND TURN.

Narrative: ON TRANSITION FROM NANCI 5 ARR INTO LGA, ATC CALLED OUT TFC 10 O'CLOCK LOW. ACR MD80 WAS CLBING OUT OF CLOUDS IN L TURN. ITS PROJECTED FLT PATH WOULD INTERSECT MY FLT AT SOME POINT AHEAD. I STOPPED MY PREVIOUSLY CLRED DSCNT TO 7000 FT AND LEVELED. WHEN RA SOUNDED, 'CLB, TFC, CLB,' I STARTED CLB AND BANKED THE ACFT TO KEEP TFC IN SIGHT. TFC LEVELED OFF APPROX 1000 FT BELOW AND WENT DIRECTLY UNDER ME. I TOOK EVASIVE ACTION TO ENSURE SUFFICIENT SEPARATION, SINCE I DID NOT KNOW IF OTHER AIRPLANE WAS GOING TO LEVEL BELOW ME.

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.