<< >> NASA ASRS Report 398331, April 1998

Apparent loss of separation between reporter's medium large transport climbing through 5500 ft for 6000 ft and another jet at 6000 ft.

Attributes
ACN	398331
Time
Date	199804
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : fll
State Reference	FL
Altitude	msl bound lower : 5500 msl bound upper : 6000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mia
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	departure other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : commercial pilot : cfi pilot : instrument
Experience	flight time last 90 days : 150 flight time total : 6100 flight time type : 900
ASRS Report	398331
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 1000 vertical : 600
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

We were given an initial clearance to fly runway heading to 3000 ft MSL after takeoff. Shortly after takeoff while talking to mia departure we received what we thought was a clearance to 6000 ft MSL, which is the altitude that I read back. As a result, during our climb on a heading of 360 degrees, we received a TCASII TA followed by an RA to descend. The conflicting traffic was another jet at 6000 ft MSL. Conflict resolved. Looking back on the situation, I thought I read back 6000 ft, and if this was in error ATC should have corrected my readback. It worked out to the advantage of both aircraft that it was VMC and our TCASII computer worked flawlessly.

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Original NASA ASRS Text

Title: APPARENT LOSS OF SEPARATION BTWN RPTR'S MLG CLBING THROUGH 5500 FT FOR 6000 FT AND ANOTHER JET AT 6000 FT.

Narrative: WE WERE GIVEN AN INITIAL CLRNC TO FLY RWY HDG TO 3000 FT MSL AFTER TKOF. SHORTLY AFTER TKOF WHILE TALKING TO MIA DEP WE RECEIVED WHAT WE THOUGHT WAS A CLRNC TO 6000 FT MSL, WHICH IS THE ALT THAT I READ BACK. AS A RESULT, DURING OUR CLB ON A HDG OF 360 DEGS, WE RECEIVED A TCASII TA FOLLOWED BY AN RA TO DSND. THE CONFLICTING TFC WAS ANOTHER JET AT 6000 FT MSL. CONFLICT RESOLVED. LOOKING BACK ON THE SIT, I THOUGHT I READ BACK 6000 FT, AND IF THIS WAS IN ERROR ATC SHOULD HAVE CORRECTED MY READBACK. IT WORKED OUT TO THE ADVANTAGE OF BOTH ACFT THAT IT WAS VMC AND OUR TCASII COMPUTER WORKED FLAWLESSLY.

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.