Assigned altitude overshot by air carrier crew in descent.

Attributes
ACN	438450
Time
Date	199905
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : atl.vortac
State Reference	GA
Altitude	msl bound lower : 10300 msl bound upper : 14000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : atl.tracon tower : phx.tower
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 22300 flight time type : 4800
ASRS Report	438450
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time last 90 days : 188 flight time total : 7075 flight time type : 2600
ASRS Report	438464
Events
Anomaly	altitude deviation : overshoot non adherence : far non adherence : clearance
Resolutory Action	controller : issued new clearance controller : issued advisory
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Our flight was at 14000 ft inbound to atl airport expecting runway 8L approach. Approach controller called and changed runway to runway 9R and in the same transmission cleared us to 12000 ft. We thought we were cleared to 9000 ft. Both pilots used double point system to verify that 9000 ft was set in altitude window. As we passed 10300 ft. The controller called to say that we were only cleared to 12000 ft. He reclred us to climb to and maintain 11000 ft. Flight was then completed uneventfully. In a phone conversation with the ATC supervisor, we learned that we had in fact read back 12000 ft. The supervisor also stated that at no time during this event was there a traffic conflict.

Original NASA ASRS Text

Title: ASSIGNED ALT OVERSHOT BY ACR CREW IN DSCNT.

Narrative: OUR FLT WAS AT 14000 FT INBOUND TO ATL ARPT EXPECTING RWY 8L APCH. APCH CTLR CALLED AND CHANGED RWY TO RWY 9R AND IN THE SAME XMISSION CLRED US TO 12000 FT. WE THOUGHT WE WERE CLRED TO 9000 FT. BOTH PLTS USED DOUBLE POINT SYS TO VERIFY THAT 9000 FT WAS SET IN ALT WINDOW. AS WE PASSED 10300 FT. THE CTLR CALLED TO SAY THAT WE WERE ONLY CLRED TO 12000 FT. HE RECLRED US TO CLB TO AND MAINTAIN 11000 FT. FLT WAS THEN COMPLETED UNEVENTFULLY. IN A PHONE CONVERSATION WITH THE ATC SUPVR, WE LEARNED THAT WE HAD IN FACT READ BACK 12000 FT. THE SUPVR ALSO STATED THAT AT NO TIME DURING THIS EVENT WAS THERE A TFC 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.