Air carrier is at incorrect altitude southwest of newark.

Attributes
ACN	464080
Time
Date	200002
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : ewr.airport
State Reference	NJ
Altitude	msl bound lower : 4000 msl bound upper : 6000
Environment
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : n90.tracon
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : intermediate altitude
Route In Use	arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
ASRS Report	464081
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	464080
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance
Independent Detector	other controllerb
Resolutory Action	controller : issued new clearance
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Captain and first officer recall hearing descent clearance from 7000 ft to 4000 ft. First officer flying. Captain read back 4000 ft and set altitude alert to 4000 ft. First officer descended to 4000 ft. Approximately 1 min after leveling at 4000 ft controller said, '...air carrier X you should be at 6000 ft...' responded that we were given and read back 4000 ft and asked whether or not to climb to 6000 ft. Controller replied no, stay at 4000 ft. We did not encounter any TCASII alert or visual traffic conflict. Proceeded to land at ewr without incident.

Original NASA ASRS Text

Title: ACR IS AT INCORRECT ALT SW OF NEWARK.

Narrative: CAPT AND FO RECALL HEARING DSCNT CLRNC FROM 7000 FT TO 4000 FT. FO FLYING. CAPT READ BACK 4000 FT AND SET ALT ALERT TO 4000 FT. FO DSNDED TO 4000 FT. APPROX 1 MIN AFTER LEVELING AT 4000 FT CTLR SAID, '...ACR X YOU SHOULD BE AT 6000 FT...' RESPONDED THAT WE WERE GIVEN AND READ BACK 4000 FT AND ASKED WHETHER OR NOT TO CLB TO 6000 FT. CTLR REPLIED NO, STAY AT 4000 FT. WE DID NOT ENCOUNTER ANY TCASII ALERT OR VISUAL TFC CONFLICT. PROCEEDED TO LAND AT EWR WITHOUT INCIDENT.

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.