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Flight crew of a canadair CL604 descended below the assigned and published altitude by 100 ft after braking out of the overcast just prior to the OM.
| Attributes | |
| ACN | 492510 |
| Time | |
| Date | 200011 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : ptk.airport |
| State Reference | MI |
| Altitude | msl bound lower : 2200 msl bound upper : 2300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : lan.tracon tower : ptk.tower |
| Operator | general aviation : corporate |
| Make Model Name | Challenger Jet Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | ils localizer only : 27l other Other |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument non precision |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 50 flight time total : 7600 |
| ASRS Report | 492510 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter : turbulence non adherence : clearance non adherence : published procedure |
| Independent Detector | atc equipment other atc equipment : radar other controllera |
| Resolutory Action | controller : issued alert none taken : anomaly accepted |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Weather |
| Primary Problem | Flight Crew Human Performance |
Narrative:
We were cleared for the back course runway 27L at ptk just outside of ernst (about 1 mi or less). At 2500 ft we broke out. I was right of centerline and so I went left to line up with the centerline of runway 27L. It was very turbulent just below the clouds. Tower told us to check our altitude. We were at 2200 ft (100 ft off) in VFR. We said 'we have the runway in sight.' he said 'I see, you're now clear to land.' turbulence caused the loss of 100 ft.
Original NASA ASRS Text
Title: FLC OF A CANADAIR CL604 DSNDED BELOW THE ASSIGNED AND PUBLISHED ALT BY 100 FT AFTER BRAKING OUT OF THE OVCST JUST PRIOR TO THE OM.
Narrative: WE WERE CLRED FOR THE BACK COURSE RWY 27L AT PTK JUST OUTSIDE OF ERNST (ABOUT 1 MI OR LESS). AT 2500 FT WE BROKE OUT. I WAS R OF CTRLINE AND SO I WENT L TO LINE UP WITH THE CTRLINE OF RWY 27L. IT WAS VERY TURBULENT JUST BELOW THE CLOUDS. TWR TOLD US TO CHK OUR ALT. WE WERE AT 2200 FT (100 FT OFF) IN VFR. WE SAID 'WE HAVE THE RWY IN SIGHT.' HE SAID 'I SEE, YOU'RE NOW CLR TO LAND.' TURB CAUSED THE LOSS OF 100 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.