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As captain noted first officer drifting below intercept altitude and advised to pull up, approach controller advised of low altitude warning.
| Attributes | |
| ACN | 194147 |
| Time | |
| Date | 199111 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : mke |
| State Reference | WI |
| Altitude | msl bound lower : 2650 msl bound upper : 2800 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mke |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent : approach descent other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 200 flight time total : 19275 flight time type : 3770 |
| ASRS Report | 194147 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : published procedure other anomaly other other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
My copilot was hand flying this ILS to runway 19R. While he was turning to intercept the localizer, he began a gradual descent out of his GS intercept altitude. I told him to climb back to our assigned intercept altitude. He started a smooth climb back to our intercept altitude and continued the approach. About the same time approach said that they were getting a low altitude warning and to climb back to 2800. We had gone below this altitude by 150 ft on this leg from msp-mke my first officer was slow on his xchk. It seemed he was eliminating the altimeter and ivsi from his xchk. This deviation was a very small amount and of a very short term. This is the first time I have ever received one of these alerts on final. If we had both missed this deviation, it is nice to know that approach control at some airports are capable of seeing this early enough to alert you of a worsening condition before it goes too far.
Original NASA ASRS Text
Title: AS CAPT NOTED FO DRIFTING BELOW INTERCEPT ALT AND ADVISED TO PULL UP, APCH CTLR ADVISED OF LOW ALT WARNING.
Narrative: MY COPLT WAS HAND FLYING THIS ILS TO RWY 19R. WHILE HE WAS TURNING TO INTERCEPT THE LOC, HE BEGAN A GRADUAL DSCNT OUT OF HIS GS INTERCEPT ALT. I TOLD HIM TO CLB BACK TO OUR ASSIGNED INTERCEPT ALT. HE STARTED A SMOOTH CLB BACK TO OUR INTERCEPT ALT AND CONTINUED THE APCH. ABOUT THE SAME TIME APCH SAID THAT THEY WERE GETTING A LOW ALT WARNING AND TO CLB BACK TO 2800. WE HAD GONE BELOW THIS ALT BY 150 FT ON THIS LEG FROM MSP-MKE MY FO WAS SLOW ON HIS XCHK. IT SEEMED HE WAS ELIMINATING THE ALTIMETER AND IVSI FROM HIS XCHK. THIS DEV WAS A VERY SMALL AMOUNT AND OF A VERY SHORT TERM. THIS IS THE FIRST TIME I HAVE EVER RECEIVED ONE OF THESE ALERTS ON FINAL. IF WE HAD BOTH MISSED THIS DEV, IT IS NICE TO KNOW THAT APCH CTL AT SOME ARPTS ARE CAPABLE OF SEEING THIS EARLY ENOUGH TO ALERT YOU OF A WORSENING CONDITION BEFORE IT GOES TOO FAR.
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.