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

Attributes
ACN	184202
Time
Date	199107
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : sax airport : ewr
State Reference	NJ
Altitude	msl bound lower : 7000 msl bound upper : 8000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other descent other
Route In Use	enroute airway : v213
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	climbout : intermediate altitude
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : instrument pilot : commercial pilot : cfi pilot : atp
Experience	flight time last 90 days : 60 flight time total : 11000 flight time type : 100
ASRS Report	184202
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Miss Distance	horizontal : 9000 vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

TCASII traffic alert followed by TCASII RA climb. Observed TCASII traffic 10:30 O'clock position 2000 ft below and climbing. Continued to monitor traffic climb and received the TA when intruder was 10:30 O'clock approximately 5 mi range 900 ft below and climbing. Received the TCASII RA when intruder was at 10:30 O'clock position 2 1/2 mi 500 ft below climbing. We were leveled at 7000 ft assigned 25 mi north of sparta VOR sbound. Accomplished positive pull up per TCASII RA climb command. After pull up was started I saw the intruder visually at approximately 9 O'clock less than 2 mi approximately 300 ft below wbound. The intruder appeared to be a light twin. It passed below and slightly behind. We advised ATC of the TCASII RA resulted in climb to 8000 ft and returned to 7000 ft when clear of traffic. Unclr if intruder was VFR or IFR.

Original NASA ASRS Text

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

Narrative: TCASII TFC ALERT FOLLOWED BY TCASII RA CLB. OBSERVED TCASII TFC 10:30 O'CLOCK POS 2000 FT BELOW AND CLBING. CONTINUED TO MONITOR TFC CLB AND RECEIVED THE TA WHEN INTRUDER WAS 10:30 O'CLOCK APPROX 5 MI RANGE 900 FT BELOW AND CLBING. RECEIVED THE TCASII RA WHEN INTRUDER WAS AT 10:30 O'CLOCK POS 2 1/2 MI 500 FT BELOW CLBING. WE WERE LEVELED AT 7000 FT ASSIGNED 25 MI N OF SPARTA VOR SBOUND. ACCOMPLISHED POSITIVE PULL UP PER TCASII RA CLB COMMAND. AFTER PULL UP WAS STARTED I SAW THE INTRUDER VISUALLY AT APPROX 9 O'CLOCK LESS THAN 2 MI APPROX 300 FT BELOW WBOUND. THE INTRUDER APPEARED TO BE A LIGHT TWIN. IT PASSED BELOW AND SLIGHTLY BEHIND. WE ADVISED ATC OF THE TCASII RA RESULTED IN CLB TO 8000 FT AND RETURNED TO 7000 FT WHEN CLR OF TFC. UNCLR IF INTRUDER WAS VFR OR IFR.

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 deviation excursion from clearance altitude in response to TCASII RA.