TCASII TA given by opposite direction traffic as reporter's aircraft at wrong altitude account improper altimeter setting. Potential conflict less than standard separation.

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Attributes
ACN	191450
Time
Date	199110
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : zny
State Reference	NY
Altitude	msl bound lower : 16700 msl bound upper : 17000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other cruise other
Route In Use	enroute : on vectors enroute airway : zny
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 200 flight time total : 12000 flight time type : 6000
ASRS Report	191450
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot conflict : airborne less severe non adherence : required legal separation non adherence : clearance non adherence : published procedure other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Miss Distance	horizontal : 3000 vertical : 700
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

First officer new to new york metropolitan area, was making descent. I was busy explaining the particular difficulty in getting down in time to cross north of sparta VOR, which would be the expected next clearance, and being complicated by delaying radar vectors. I looked ahead and saw lights of approaching transport aircraft 11 O'clock low. Said aircraft commented to controller of 'TCASII alert' as they passed us, 'but since they had visual contact, took no action'. I commented that I also saw other aircraft. Later, the controller asked us to 'verify 17M'. I verified 17M, only then to realize that we had descended out of FL200 without resetting the 2 altimeters and the altitude alert to 29.62. Thusly, I pointed out to the first officer that we were flying approximately 300 ft too low. Shortly we were given additional descent clearance, reset altimeters and continued on our way. Moral: it takes 2 experienced crew members to operate in the new york metropolitan area.

Original NASA ASRS Text

Title: TCASII TA GIVEN BY OPPOSITE DIRECTION TFC AS RPTR'S ACFT AT WRONG ALT ACCOUNT IMPROPER ALTIMETER SETTING. POTENTIAL CONFLICT LTSS.

Narrative: FO NEW TO NEW YORK METROPOLITAN AREA, WAS MAKING DSCNT. I WAS BUSY EXPLAINING THE PARTICULAR DIFFICULTY IN GETTING DOWN IN TIME TO CROSS N OF SPARTA VOR, WHICH WOULD BE THE EXPECTED NEXT CLRNC, AND BEING COMPLICATED BY DELAYING RADAR VECTORS. I LOOKED AHEAD AND SAW LIGHTS OF APCHING TRANSPORT ACFT 11 O'CLOCK LOW. SAID ACFT COMMENTED TO CTLR OF 'TCASII ALERT' AS THEY PASSED US, 'BUT SINCE THEY HAD VISUAL CONTACT, TOOK NO ACTION'. I COMMENTED THAT I ALSO SAW OTHER ACFT. LATER, THE CTLR ASKED US TO 'VERIFY 17M'. I VERIFIED 17M, ONLY THEN TO REALIZE THAT WE HAD DSNDED OUT OF FL200 WITHOUT RESETTING THE 2 ALTIMETERS AND THE ALT ALERT TO 29.62. THUSLY, I POINTED OUT TO THE FO THAT WE WERE FLYING APPROX 300 FT TOO LOW. SHORTLY WE WERE GIVEN ADDITIONAL DSCNT CLRNC, RESET ALTIMETERS AND CONTINUED ON OUR WAY. MORAL: IT TAKES 2 EXPERIENCED CREW MEMBERS TO OPERATE IN THE NEW YORK METROPOLITAN AREA.

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.