Air carrier large transport altitude deviation overshot during descent.

Attributes
ACN	134894
Time
Date	199001
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : dpk
State Reference	NY
Altitude	msl bound lower : 10000 msl bound upper : 11000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	cruise other descent other
Route In Use	arrival star : star enroute airway : zny
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 200 flight time total : 12000 flight time type : 1500
ASRS Report	134894
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 150 flight time total : 8000 flight time type : 3000
ASRS Report	134621
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	other controllera
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	Operational Deviation Pilot Deviation other

Narrative:

ZNY controller cleared us direct to mad VOR, told us to maintain 10000', 250 KTS at mad. I was making arrival passenger announcement, but heard the transmission from the controller. I also heard the first officer, the PF, repeat the clearance back with an altitude of 10000'. The center controller then handed us off to bradley approach. As we descended through 10300', the approach controller advised us that we were supposed to level at 11000'. I confirmed this clearance with the approach controller, and we regained 11000' and leveled. I told the controller we had heard and read back 10000' to the center. He had no explanation, but gave me the phone # I requested to debrief the incident to the approach control supervisor. I was told there was no conflict involved and that the incident was therefore resolved at that level of contact.

Original NASA ASRS Text

Title: ACR LGT ALT DEVIATION OVERSHOT DURING DESCENT.

Narrative: ZNY CTLR CLRED US DIRECT TO MAD VOR, TOLD US TO MAINTAIN 10000', 250 KTS AT MAD. I WAS MAKING ARR PAX ANNOUNCEMENT, BUT HEARD THE XMISSION FROM THE CTLR. I ALSO HEARD THE F/O, THE PF, REPEAT THE CLRNC BACK WITH AN ALT OF 10000'. THE CENTER CTLR THEN HANDED US OFF TO BRADLEY APCH. AS WE DSNDED THROUGH 10300', THE APCH CTLR ADVISED US THAT WE WERE SUPPOSED TO LEVEL AT 11000'. I CONFIRMED THIS CLRNC WITH THE APCH CTLR, AND WE REGAINED 11000' AND LEVELED. I TOLD THE CTLR WE HAD HEARD AND READ BACK 10000' TO THE CENTER. HE HAD NO EXPLANATION, BUT GAVE ME THE PHONE # I REQUESTED TO DEBRIEF THE INCIDENT TO THE APCH CTL SUPVR. I WAS TOLD THERE WAS NO CONFLICT INVOLVED AND THAT THE INCIDENT WAS THEREFORE RESOLVED AT THAT LEVEL OF CONTACT.

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.