An air carrier climbed in response to a TCASII command.

Attributes
ACN	267124
Time
Date	199403
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : rbv
State Reference	NJ
Altitude	msl bound lower : 8000 msl bound upper : 8300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	MD-88
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	enroute airway : n90
Flight Plan	IFR
Aircraft 2
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	other : unknown
Flight Phase	cruise other
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 130 flight time total : 15000 flight time type : 1900
ASRS Report	267124
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 150 flight time total : 5866 flight time type : 3166
ASRS Report	267114
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 2000 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Cleared from 8000 ft to 6000 ft by approach control. Started descent, TCASII aural alert to climb. Complied with to 8300 ft, then we advised approach control of conflict and evasive action altitude. Approach control then advised us of conflicting traffic: after conflict resolved, descended to 8000 ft approach control now told us to maintain 8000 ft. Approach control very busy with overall traffic and numerous voice communications, high workload with limited time constraints. Supplemental information from acn 267114: approach control instructed us to descend to 6000 ft from 8000 ft. As soon as the PF (captain) initiated descent, had TCASII alert followed by RA, to climb immediately. We saw traffic on the screen as well as visually shortly after this. The captain disconnected the autoplt and immediately started climb as advised by TCASII. We climbed to approximately 8300 ft and by this time had traffic visually and had reported this to ny approach. They said they had called the traffic to us. If they did, we did not hear it because of the TCASII advisory's going off as well as our talk to get out of the conflict.

Original NASA ASRS Text

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

Narrative: CLEARED FROM 8000 FT TO 6000 FT BY APCH CTL. STARTED DSCNT, TCASII AURAL ALERT TO CLB. COMPLIED WITH TO 8300 FT, THEN WE ADVISED APCH CTL OF CONFLICT AND EVASIVE ACTION ALT. APCH CTL THEN ADVISED US OF CONFLICTING TFC: AFTER CONFLICT RESOLVED, DSNDED TO 8000 FT APCH CTL NOW TOLD US TO MAINTAIN 8000 FT. APCH CTL VERY BUSY WITH OVERALL TFC AND NUMEROUS VOICE COMS, HIGH WORKLOAD WITH LIMITED TIME CONSTRAINTS. SUPPLEMENTAL INFO FROM ACN 267114: APCH CTL INSTRUCTED US TO DSND TO 6000 FT FROM 8000 FT. AS SOON AS THE PF (CAPT) INITIATED DSCNT, HAD TCASII ALERT FOLLOWED BY RA, TO CLB IMMEDIATELY. WE SAW TFC ON THE SCREEN AS WELL AS VISUALLY SHORTLY AFTER THIS. THE CAPT DISCONNECTED THE AUTOPLT AND IMMEDIATELY STARTED CLB AS ADVISED BY TCASII. WE CLBED TO APPROX 8300 FT AND BY THIS TIME HAD TFC VISUALLY AND HAD RPTED THIS TO NY APCH. THEY SAID THEY HAD CALLED THE TFC TO US. IF THEY DID, WE DID NOT HEAR IT BECAUSE OF THE TCASII ADVISORY'S GOING OFF AS WELL AS OUR TALK TO GET OUT OF THE CONFLICT.

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.