Air carrier medium large transport altitude deviaton excursion from clearance altitude in response t...

Attributes
ACN	173340
Time
Date	199103
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lga
State Reference	NY
Altitude	msl bound lower : 11000 msl bound upper : 11250
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other descent other
Route In Use	arrival star : star enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 11000 flight time type : 900
ASRS Report	173340
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 12000 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Approximately 40 mi out of lga. Traffic reported at 12 O'clock position, opp direction at 10500' MSL, from nyc. TA on TCASII conflict displayed traffic 10700' and climbing. We were at 11000' MSL. RA on TCAS: 'monitor vertical speed,' 'climb, climb now,' 'climb, climb now.' asked ZNY for immediate left turn. Received 30 degree left and per TCASII orders climbed 250'. Told ZNY and they said they didn't know any TCAS procedure, but would check with supervisor. On ground, contacted company supervisor and ARTCC supervisor. We discussed situation. Were told we did the right thing and that a pilot deviation was not reported, only a TCASII procedure sheet. If we had not turned and climbed, conflict would have been hazardous.

Original NASA ASRS Text

Title: ACR MLG ALT DEVIATON EXCURSION FROM CLRNC ALT IN RESPONSE TO TCASII RA.

Narrative: APPROX 40 MI OUT OF LGA. TFC RPTED AT 12 O'CLOCK POS, OPP DIRECTION AT 10500' MSL, FROM NYC. TA ON TCASII CONFLICT DISPLAYED TFC 10700' AND CLBING. WE WERE AT 11000' MSL. RA ON TCAS: 'MONITOR VERT SPD,' 'CLB, CLB NOW,' 'CLB, CLB NOW.' ASKED ZNY FOR IMMEDIATE LEFT TURN. RECEIVED 30 DEG LEFT AND PER TCASII ORDERS CLBED 250'. TOLD ZNY AND THEY SAID THEY DIDN'T KNOW ANY TCAS PROC, BUT WOULD CHK WITH SUPVR. ON GND, CONTACTED COMPANY SUPVR AND ARTCC SUPVR. WE DISCUSSED SITUATION. WERE TOLD WE DID THE RIGHT THING AND THAT A PLT DEVIATION WAS NOT RPTED, ONLY A TCASII PROC SHEET. IF WE HAD NOT TURNED AND CLBED, CONFLICT WOULD HAVE BEEN HAZARDOUS.

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.

Air carrier medium large transport altitude deviaton excursion from clearance altitude in response to TCASII RA.