Crossing restr not met during the profile descent to cyyz, on.

Attributes
ACN	488291
Time
Date	200010
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : yyz.airport
State Reference	ON
Altitude	msl bound lower : 7000 msl bound upper : 12000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : arr.tower
Operator	common carrier : air carrier
Make Model Name	A320
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : vacating altitude
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : flight engineer pilot : atp pilot : multi engine
Experience	flight time last 90 days : 80 flight time total : 14000 flight time type : 3500
ASRS Report	488291
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 300 flight time total : 5000 flight time type : 2000
ASRS Report	488640
Events
Anomaly	altitude deviation : crossing restriction not met altitude deviation : overshoot non adherence : clearance non adherence : published procedure
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : anomaly accepted none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

When cleared to cross ricki (on the arrival) at 7000 ft, we may have crossed the ywt 15 DME arc below 12000 ft as depicted on the arrival. I did not realize our altitude until passed the arc. Must not lose sight of a still valid registration on an arrival when setting up for the next. Supplemental information from acn 488640: cleared to descend via the profile. We went below the profile altitude of 12000 ft.

Original NASA ASRS Text

Title: XING RESTR NOT MET DURING THE PROFILE DSCNT TO CYYZ, ON.

Narrative: WHEN CLRED TO CROSS RICKI (ON THE ARR) AT 7000 FT, WE MAY HAVE CROSSED THE YWT 15 DME ARC BELOW 12000 FT AS DEPICTED ON THE ARR. I DID NOT REALIZE OUR ALT UNTIL PASSED THE ARC. MUST NOT LOSE SIGHT OF A STILL VALID REGISTRATION ON AN ARR WHEN SETTING UP FOR THE NEXT. SUPPLEMENTAL INFO FROM ACN 488640: CLRED TO DSND VIA THE PROFILE. WE WENT BELOW THE PROFILE ALT OF 12000 FT.

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.