An air carrier medium large transport climbed in response to a TCASII command.

Attributes
ACN	242511
Time
Date	199305
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : bhm
State Reference	AL
Altitude	msl bound lower : 10000 msl bound upper : 10700
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Route In Use	enroute airway : bhm
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 8800 flight time type : 4100
ASRS Report	242511
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 200 flight time total : 10000 flight time type : 3000
ASRS Report	242653
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa
Resolutory Action	flight crew : took evasive action flight crew : returned to intended course or assigned course
Consequence	faa : reviewed incident with flight crew
Miss Distance	vertical : 1000
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

This was a standard TCASII RA maneuver. Traffic at 12 O'clock, 5 mi, opposite direction. VFR at 9600 ft. We were IFR on approach control at 10000 ft. TCASII TA followed by RA 'climb.' climbed to 10700 ft followed by 'monitor vertical speed' and 'clear of conflict.' ATC was in radio contact with the VFR traffic but never issued us a TA? ATC indicated no conflict. Supplemental information from acn 242653: ATC was called on ground. No other ATC conflict encountered.

Original NASA ASRS Text

Title: AN ACR MLG CLBED IN RESPONSE TO A TCASII COMMAND.

Narrative: THIS WAS A STANDARD TCASII RA MANEUVER. TFC AT 12 O'CLOCK, 5 MI, OPPOSITE DIRECTION. VFR AT 9600 FT. WE WERE IFR ON APCH CTL AT 10000 FT. TCASII TA FOLLOWED BY RA 'CLB.' CLBED TO 10700 FT FOLLOWED BY 'MONITOR VERT SPD' AND 'CLR OF CONFLICT.' ATC WAS IN RADIO CONTACT WITH THE VFR TFC BUT NEVER ISSUED US A TA? ATC INDICATED NO CONFLICT. SUPPLEMENTAL INFO FROM ACN 242653: ATC WAS CALLED ON GND. NO OTHER ATC CONFLICT ENCOUNTERED.

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.