Altitude deviation. Proper TCASII RA. ATC caught overshoot.

Attributes
ACN	292945
Time
Date	199501
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : atl
State Reference	GA
Altitude	msl bound lower : 10000 msl bound upper : 10400
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : atl
Operator	common carrier : air carrier
Make Model Name	MD-88
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	descent other
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time type : 2300
ASRS Report	292945
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 5700 flight time type : 2700
ASRS Report	292946
Events
Anomaly	altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was cleared for departure off runway 26. Once airborne, given clearance to contact departure control. We were cleared to 10000 ft. Passing approximately 5000 ft MSL, cleared right turn to 350 degrees. Passing approximately 7500 ft MSL, both copilot and I heard clearance to climb to 14000 ft. I read back clearance to climb to 14000 ft, set altitude in altitude window and copilot acknowledged clearance. Passing 10300 ft, approach control issued 'maintain 10000 ft, traffic on arrival at 12000 ft.' we acknowledged and returned to 10000 ft. The highest we showed was 10400 ft. Just after departure control issued the 10000 ft call, the TCASII issued an RA, but we had already started back down to 10000 ft and had traffic in sight. Looking back at the incident, I am not sure if the original clearance to 14000 ft was for us or not. There were several similar call signs on departure control at same time. Also, my readback of clearance to 14000 ft may have been covered up by another aircraft responding at same time. Supplemental information from acn 292946: as the PF I obviously couldn't devote all of my concentration on the radio xmissions. I was gearing up for a 10000 ft leveloff at the same time we received the supposed clearance.

Original NASA ASRS Text

Title: ALTDEV. PROPER TCASII RA. ATC CAUGHT OVERSHOOT.

Narrative: I WAS CLRED FOR DEP OFF RWY 26. ONCE AIRBORNE, GIVEN CLRNC TO CONTACT DEP CTL. WE WERE CLRED TO 10000 FT. PASSING APPROX 5000 FT MSL, CLRED R TURN TO 350 DEGS. PASSING APPROX 7500 FT MSL, BOTH COPLT AND I HEARD CLRNC TO CLB TO 14000 FT. I READ BACK CLRNC TO CLB TO 14000 FT, SET ALT IN ALT WINDOW AND COPLT ACKNOWLEDGED CLRNC. PASSING 10300 FT, APCH CTL ISSUED 'MAINTAIN 10000 FT, TFC ON ARR AT 12000 FT.' WE ACKNOWLEDGED AND RETURNED TO 10000 FT. THE HIGHEST WE SHOWED WAS 10400 FT. JUST AFTER DEP CTL ISSUED THE 10000 FT CALL, THE TCASII ISSUED AN RA, BUT WE HAD ALREADY STARTED BACK DOWN TO 10000 FT AND HAD TFC IN SIGHT. LOOKING BACK AT THE INCIDENT, I AM NOT SURE IF THE ORIGINAL CLRNC TO 14000 FT WAS FOR US OR NOT. THERE WERE SEVERAL SIMILAR CALL SIGNS ON DEP CTL AT SAME TIME. ALSO, MY READBACK OF CLRNC TO 14000 FT MAY HAVE BEEN COVERED UP BY ANOTHER ACFT RESPONDING AT SAME TIME. SUPPLEMENTAL INFO FROM ACN 292946: AS THE PF I OBVIOUSLY COULDN'T DEVOTE ALL OF MY CONCENTRATION ON THE RADIO XMISSIONS. I WAS GEARING UP FOR A 10000 FT LEVELOFF AT THE SAME TIME WE RECEIVED THE SUPPOSED CLRNC.

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.