Altitude overshoot during arrival to dtw, mi.

Attributes
ACN	487180
Time
Date	200009
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : crl.vortac
State Reference	MI
Altitude	msl bound lower : 5600 msl bound upper : 6000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : d21.tracon
Operator	common carrier : air carrier
Make Model Name	DC-9 50
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 200 flight time total : 7000 flight time type : 1100
ASRS Report	487180
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	aircraft equipment : altitude alert other flight crewa
Resolutory Action	flight crew : returned to assigned altitude
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

During descent I completed the approach briefing. We were expecting an ILS for runway 3R at dtw. During vectoring we were advised that the ILS runway 3R with no GS was in progress. During a 're-briefing' of the approach the altitude deviation occurred we were on a radar vector descending to 6000 ft. When the altitude alerter went off I leveled off and climbed back to 6000 ft. We had descended to 5600 ft before I could correct my mistake. The prior night I did not sleep well. That, and being very familiar, and maybe a little complacent with operations into and out of dtw, were probably contributing factors. Approach control did not notice our deviation. The approach and landing were completed without further incident.

Original NASA ASRS Text

Title: ALT OVERSHOOT DURING ARR TO DTW, MI.

Narrative: DURING DSCNT I COMPLETED THE APCH BRIEFING. WE WERE EXPECTING AN ILS FOR RWY 3R AT DTW. DURING VECTORING WE WERE ADVISED THAT THE ILS RWY 3R WITH NO GS WAS IN PROGRESS. DURING A 'RE-BRIEFING' OF THE APCH THE ALTDEV OCCURRED WE WERE ON A RADAR VECTOR DSNDING TO 6000 FT. WHEN THE ALT ALERTER WENT OFF I LEVELED OFF AND CLBED BACK TO 6000 FT. WE HAD DSNDED TO 5600 FT BEFORE I COULD CORRECT MY MISTAKE. THE PRIOR NIGHT I DID NOT SLEEP WELL. THAT, AND BEING VERY FAMILIAR, AND MAYBE A LITTLE COMPLACENT WITH OPS INTO AND OUT OF DTW, WERE PROBABLY CONTRIBUTING FACTORS. APCH CTL DID NOT NOTICE OUR DEV. THE APCH AND LNDG WERE COMPLETED WITHOUT FURTHER 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.