Flight crew of air carrier large transport aircraft deviated from assigned altitude in response to a...

Attributes
ACN	226715
Time
Date	199211
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : sbj airport : lga
State Reference	NJ
Altitude	msl bound lower : 11000 msl bound upper : 11700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Large Transport
Flight Phase	descent other
Route In Use	arrival other arrival star : star enroute airway : n90
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : cfi pilot : atp
Experience	flight time last 90 days : 150 flight time total : 4500 flight time type : 1000
ASRS Report	226715
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Miss Distance	vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Level at 11000 approach control issued traffic not in sight. Shortly thereafter, we got a TA/RA. On the scope it showed -04 11 O'clock 3 mi converging. We all visually checked but were unable to locate aircraft. Speculated it was scud running in undercast (approximately 500 ft below us) at 10500 VFR (?). Then we got climb command. PF was first officer who initiated climb. Frequency congestion prevented advising ATC until we were 'clear' of traffic at 11700 ft. Once we advised of the action we began descent to 11000. No comment other then 'roger' from ATC.

Original NASA ASRS Text

Title: FLC OF ACR LGT ACFT DEVIATED FROM ASSIGNED ALT IN RESPONSE TO A TCASII RA.

Narrative: LEVEL AT 11000 APCH CTL ISSUED TFC NOT IN SIGHT. SHORTLY THEREAFTER, WE GOT A TA/RA. ON THE SCOPE IT SHOWED -04 11 O'CLOCK 3 MI CONVERGING. WE ALL VISUALLY CHKED BUT WERE UNABLE TO LOCATE ACFT. SPECULATED IT WAS SCUD RUNNING IN UNDERCAST (APPROX 500 FT BELOW US) AT 10500 VFR (?). THEN WE GOT CLB COMMAND. PF WAS FO WHO INITIATED CLB. FREQ CONGESTION PREVENTED ADVISING ATC UNTIL WE WERE 'CLR' OF TFC AT 11700 FT. ONCE WE ADVISED OF THE ACTION WE BEGAN DSCNT TO 11000. NO COMMENT OTHER THEN 'ROGER' FROM ATC.

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.

Flight crew of air carrier large transport aircraft deviated from assigned altitude in response to a TCASII RA.