Learjet 25 captain overshot intermediate descent altitude.

Attributes
ACN	531293
Time
Date	200111
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : d21.tracon
State Reference	MI
Altitude	msl bound lower : 11500 msl bound upper : 12000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : d21.tracon tracon : ind.tracon
Operator	common carrier : air taxi
Make Model Name	Learjet 25
Operating Under FAR Part	Part 135
Flight Phase	descent : approach
Route In Use	arrival star : mizar3
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 170 flight time total : 3200 flight time type : 1200
ASRS Report	531293
Person 2
Affiliation	company : air taxi
Function	flight crew : first officer
Qualification	pilot : atp pilot : multi engine pilot : cfi
Experience	flight time last 90 days : 120 flight time total : 3100 flight time type : 410
ASRS Report	531262
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	atc equipment other atc equipment : radar aircraft equipment other aircraft equipment : altimeter/ alert other controllera other flight crewa other flight crewb
Resolutory Action	flight crew : returned to assigned altitude
Consequence	Other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While descending on the mizar 3 arrival into dtw to assigned altitude of 12000 ft, my copilot pointed out that I was going below 12000 ft. I started my recovery immediately at 11700 ft, but did not want to cause undue stress on my passenger, so I recovered as smoothly as possible. My altitude touched 11500 ft at the bottom and then came right back up. As I climbed through 11800 ft, dtw approach asked me my altitude. By the time I responded, I was passing 11900 ft and said '11900 ft, climbing to 12000 ft.' in the future, I will be more diligent in my situational awareness. In addition, I will take more aggressive corrective action and take the risk of having to apologize to my passenger for the discomfort rather than allow the aircraft to be placed in harm's way.

Original NASA ASRS Text

Title: LEARJET 25 CAPT OVERSHOT INTERMEDIATE DSCNT ALT.

Narrative: WHILE DSNDING ON THE MIZAR 3 ARR INTO DTW TO ASSIGNED ALT OF 12000 FT, MY COPLT POINTED OUT THAT I WAS GOING BELOW 12000 FT. I STARTED MY RECOVERY IMMEDIATELY AT 11700 FT, BUT DID NOT WANT TO CAUSE UNDUE STRESS ON MY PAX, SO I RECOVERED AS SMOOTHLY AS POSSIBLE. MY ALT TOUCHED 11500 FT AT THE BOTTOM AND THEN CAME RIGHT BACK UP. AS I CLBED THROUGH 11800 FT, DTW APCH ASKED ME MY ALT. BY THE TIME I RESPONDED, I WAS PASSING 11900 FT AND SAID '11900 FT, CLBING TO 12000 FT.' IN THE FUTURE, I WILL BE MORE DILIGENT IN MY SITUATIONAL AWARENESS. IN ADDITION, I WILL TAKE MORE AGGRESSIVE CORRECTIVE ACTION AND TAKE THE RISK OF HAVING TO APOLOGIZE TO MY PAX FOR THE DISCOMFORT RATHER THAN ALLOW THE ACFT TO BE PLACED IN HARM'S WAY.

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.