Large transport descended prematurely and entered airspace delegated to another facility.

Attributes
ACN	103714
Time
Date	198902
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : lax
State Reference	CA
Altitude	msl bound lower : 10000 msl bound upper : 14000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla tower : ewr
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent other
Route In Use	enroute airway : zla
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	103714
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Large transport inbound to los angeles was told to cross civet (52 east of los angeles) at 14000' descend and maintain 10000'. The pilot read back the clearance correctly but descended to 10000' 12 miles prior to crossing civet, thus descending into ont approach control's airspace. Fortunately ont had no traffic in the area at the time of the incident.

Original NASA ASRS Text

Title: LGT DESCENDED PREMATURELY AND ENTERED AIRSPACE DELEGATED TO ANOTHER FACILITY.

Narrative: LGT INBND TO LOS ANGELES WAS TOLD TO CROSS CIVET (52 E OF LOS ANGELES) AT 14000' DSND AND MAINTAIN 10000'. THE PLT READ BACK THE CLRNC CORRECTLY BUT DSNDED TO 10000' 12 MILES PRIOR TO XING CIVET, THUS DSNDING INTO ONT APCH CTL'S AIRSPACE. FORTUNATELY ONT HAD NO TFC IN THE AREA AT THE TIME OF THE INCIDENT.

Data retrieved from NASA's ASRS site as of August 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.