Thought cleared climb to 17000'. Controller wanted 7000'. Possible conflict.

Attributes
ACN	170928
Time
Date	199102
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lga
State Reference	NY
Altitude	msl bound lower : 7000 msl bound upper : 8000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	departure sid : sid
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	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 : 250 flight time total : 5780 flight time type : 250
ASRS Report	170928
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 0 vertical : 1000
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We departed 13 (runway) whitestone climb to 5000'. We were handed over to departure. We were on a 175 degree heading. Departure gave us a 'left turn to 340 degrees, climb and maintain 17000'.' I read back to departure, 'left turn to 340 degrees, climb and maintain 17000'.' the captain and I had also confirmed the clearance given by ATC with each other. On the 340 degree heading and at 8000', another voice came on the frequency and said, 'stop climb, traffic 9000', return to 7000'.' we stopped at 8000' and immediately began descent to 7000'. I had told departure we had heard and read back 17000'. WX was hazy at 8000'.

Original NASA ASRS Text

Title: THOUGHT CLEARED CLIMB TO 17000'. CTLR WANTED 7000'. POSSIBLE CONFLICT.

Narrative: WE DEPARTED 13 (RWY) WHITESTONE CLB TO 5000'. WE WERE HANDED OVER TO DEP. WE WERE ON A 175 DEG HDG. DEP GAVE US A 'LEFT TURN TO 340 DEGS, CLB AND MAINTAIN 17000'.' I READ BACK TO DEP, 'LEFT TURN TO 340 DEGS, CLB AND MAINTAIN 17000'.' THE CAPT AND I HAD ALSO CONFIRMED THE CLRNC GIVEN BY ATC WITH EACH OTHER. ON THE 340 DEG HDG AND AT 8000', ANOTHER VOICE CAME ON THE FREQ AND SAID, 'STOP CLB, TFC 9000', RETURN TO 7000'.' WE STOPPED AT 8000' AND IMMEDIATELY BEGAN DSNT TO 7000'. I HAD TOLD DEP WE HAD HEARD AND READ BACK 17000'. WX WAS HAZY AT 8000'.

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.