An large transport, in the clouds, responded to conflicting commands from TCASII and TRACON regarding aircraft traffic.

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Attributes
ACN	226720
Time
Date	199211
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : lga
State Reference	NY
Altitude	msl bound lower : 2700 msl bound upper : 2700
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : n90 artcc : mmex
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : initial
Route In Use	departure other departure sid : sid
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 134 flight time total : 5185 flight time type : 2100
ASRS Report	226720
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 50 flight time total : 22000 flight time type : 1500
ASRS Report	226454
Events
Anomaly	altitude deviation : overshoot conflict : airborne less severe non adherence : clearance non adherence : required legal separation other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 5000
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We took off on runway 13 at laguardia on laguardia 4 departure/whitestone climb. Upon switching to departure control and checking in, the controller responded, 'air carrier X, descend immediately, descend immediately!' at about this time we also got a TCASII caution 'monitor vertical speed.' we were at about 2700 ft MSL, 12 degrees nose up climbing to our assigned altitude of 5000 ft and about to begin a left turn to 040 degrees as per the whitestone climb. The captain pushed the nose over to comply with the controller and 4-5 seconds later we got a TCASII RA of 'climb, climb.' the captain pulled the nose up to comply with TCASII. The departure controller then cleared us to 5000 ft and told us that 'they descended the other guy.' the explanation later given us was that traffic at jfk had 'overshot' and caused the conflict. We were in IMC during the entire evolution. Supplemental information from acn 226454: this all happened in a very short time frame. Very uncomfortable situation for crew and lousy ride for the passenger.

Original NASA ASRS Text

Title: AN LGT, IN THE CLOUDS, RESPONDED TO CONFLICTING COMMANDS FROM TCASII AND TRACON REGARDING ACFT TFC.

Narrative: WE TOOK OFF ON RWY 13 AT LAGUARDIA ON LAGUARDIA 4 DEP/WHITESTONE CLB. UPON SWITCHING TO DEP CTL AND CHKING IN, THE CTLR RESPONDED, 'ACR X, DSND IMMEDIATELY, DSND IMMEDIATELY!' AT ABOUT THIS TIME WE ALSO GOT A TCASII CAUTION 'MONITOR VERT SPD.' WE WERE AT ABOUT 2700 FT MSL, 12 DEGS NOSE UP CLBING TO OUR ASSIGNED ALT OF 5000 FT AND ABOUT TO BEGIN A L TURN TO 040 DEGS AS PER THE WHITESTONE CLB. THE CAPT PUSHED THE NOSE OVER TO COMPLY WITH THE CTLR AND 4-5 SECONDS LATER WE GOT A TCASII RA OF 'CLB, CLB.' THE CAPT PULLED THE NOSE UP TO COMPLY WITH TCASII. THE DEP CTLR THEN CLRED US TO 5000 FT AND TOLD US THAT 'THEY DSNDED THE OTHER GUY.' THE EXPLANATION LATER GIVEN US WAS THAT TFC AT JFK HAD 'OVERSHOT' AND CAUSED THE CONFLICT. WE WERE IN IMC DURING THE ENTIRE EVOLUTION. SUPPLEMENTAL INFO FROM ACN 226454: THIS ALL HAPPENED IN A VERY SHORT TIME FRAME. VERY UNCOMFORTABLE SITUATION FOR CREW AND LOUSY RIDE FOR THE PAX.

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.