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ZTL controller observed flight crew descend below crossing altitude for avl ILS runway 16 approach and alerted pilot to the appropriate altitude.
| Attributes | |
| ACN | 633937 |
| Time | |
| Date | 200410 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : sot.vortac |
| State Reference | TN |
| Altitude | msl bound lower : 6400 msl bound upper : 6800 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Learjet 24 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | ils localizer & glide slope : 16 |
| Flight Phase | descent : intermediate altitude |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 22 flight time total : 10 |
| ASRS Report | 633937 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met non adherence : published procedure |
| Independent Detector | atc equipment : msaw other controllera |
| Resolutory Action | controller : issued advisory |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Chart Or Publication |
| Primary Problem | Flight Crew Human Performance |
Narrative:
The lear had been cleared for ILS runway 16 ayl via the sot transition. It was on the sot 114 degree radial to junoe. The MSAW went off. We do not display junoe on the radar scope. I checked the approach plate, 6800 ft until junoe. I asked the pilot if we had passed junoe. The answer was negative. I advised the lear that 6800 fr was the minimum altitude until junoe. He was at 6400 ft and climbed back up to 6800 ft. We were fortunate to see this on radar. We often can't see below 8000 ft in this area.
Original NASA ASRS Text
Title: ZTL CTLR OBSERVED FLT CREW DSND BELOW XING ALT FOR AVL ILS RWY 16 APCH AND ALERTED PLT TO THE APPROPRIATE ALT.
Narrative: THE LEAR HAD BEEN CLRED FOR ILS RWY 16 AYL VIA THE SOT TRANSITION. IT WAS ON THE SOT 114 DEG RADIAL TO JUNOE. THE MSAW WENT OFF. WE DO NOT DISPLAY JUNOE ON THE RADAR SCOPE. I CHKED THE APCH PLATE, 6800 FT UNTIL JUNOE. I ASKED THE PLT IF WE HAD PASSED JUNOE. THE ANSWER WAS NEGATIVE. I ADVISED THE LEAR THAT 6800 FR WAS THE MINIMUM ALT UNTIL JUNOE. HE WAS AT 6400 FT AND CLBED BACK UP TO 6800 FT. WE WERE FORTUNATE TO SEE THIS ON RADAR. WE OFTEN CAN'T SEE BELOW 8000 FT IN THIS AREA.
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.