MD80 crew had near midair collision with unknown aircraft on climb in class a airspace, then had an ...

Attributes
ACN	423386
Time
Date	199810
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : aus
State Reference	TX
Altitude	msl bound lower : 20500 msl bound upper : 21000
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Flight Phase	cruise other descent other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	423386
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
Events
Anomaly	altitude deviation : crossing restriction not met conflict : nmac
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Air Traffic Incident	Pilot Deviation

Narrative:

Just departing austin we were at about FL205 climbing to FL210 when I received an RA, which I followed and at about the same time I disconnected the autoplt and autothrottles to manually fly the aircraft. We were entering a little area of rain showers, which I also was deviating. Evidently at this same time while I was doing all this, we received a clearance to cross hirst intersection at 11000 ft. When the aircraft was now at FL210 and stabilized from the TA, I was told from first officer our clearance was to cross hirst at 10000 ft. I did so and was level at hirst at 10000 ft when we were now talking to dfw approach who told us to climb and maintain 11000 ft and that that should have been our altitude. We climbed to 11000 ft and asked him if there was a conflict. He said no. My copilot is sure he heard the restr as 10000 ft. I should have heard the clearance myself but I did not. I was quite busy flying the aircraft at the time.

Original NASA ASRS Text

Title: MD80 CREW HAD NMAC WITH UNKNOWN ACFT ON CLB IN CLASS A AIRSPACE, THEN HAD AN ALTDEV WHEN THEY MISSED A XING RESTR ON DSCNT.

Narrative: JUST DEPARTING AUSTIN WE WERE AT ABOUT FL205 CLBING TO FL210 WHEN I RECEIVED AN RA, WHICH I FOLLOWED AND AT ABOUT THE SAME TIME I DISCONNECTED THE AUTOPLT AND AUTOTHROTTLES TO MANUALLY FLY THE ACFT. WE WERE ENTERING A LITTLE AREA OF RAIN SHOWERS, WHICH I ALSO WAS DEVIATING. EVIDENTLY AT THIS SAME TIME WHILE I WAS DOING ALL THIS, WE RECEIVED A CLRNC TO CROSS HIRST INTXN AT 11000 FT. WHEN THE ACFT WAS NOW AT FL210 AND STABILIZED FROM THE TA, I WAS TOLD FROM FO OUR CLRNC WAS TO CROSS HIRST AT 10000 FT. I DID SO AND WAS LEVEL AT HIRST AT 10000 FT WHEN WE WERE NOW TALKING TO DFW APCH WHO TOLD US TO CLB AND MAINTAIN 11000 FT AND THAT THAT SHOULD HAVE BEEN OUR ALT. WE CLBED TO 11000 FT AND ASKED HIM IF THERE WAS A CONFLICT. HE SAID NO. MY COPLT IS SURE HE HEARD THE RESTR AS 10000 FT. I SHOULD HAVE HEARD THE CLRNC MYSELF BUT I DID NOT. I WAS QUITE BUSY FLYING THE ACFT AT THE TIME.

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.

MD80 crew had near midair collision with unknown aircraft on climb in class a airspace, then had an altitude deviation when they missed a crossing restr on descent.