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An air carrier jet is assigned a difficult altitude crossing restr. The first officer must descend from FL330 and cross jot VOR at 6000 ft, with less than 50 mi in distance. The aircraft is descended to 9000 ft at 300 KTS before the first officer realizes his mistake. The captain said nothing about the speed deviation.
| Attributes | |
| ACN | 428500 |
| Time | |
| Date | 199902 |
| Day | Thu |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | navaid : jot.vortac |
| State Reference | IL |
| Altitude | msl bound lower : 8000 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau.artcc tracon : c90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | cruise : enroute altitude change cruise : level descent : intermediate altitude |
| Route In Use | enroute airway : ns.airway |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : atp pilot : cfi technician : powerplant technician : airframe |
| Experience | flight time last 90 days : 70 flight time total : 9500 flight time type : 110 |
| ASRS Report | 428500 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : far non adherence : published procedure other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : became reoriented other |
| Consequence | Other |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Assigned a difficult crossing restr from FL330 to cross jot VOR at 6000 ft. Less than 50 NM to accomplish. Full speed brakes, 4000-5000 FPM descent rate at 300 KIAS. Inadvertently descended below 10000 ft at this speed. Realized at about 9000 ft and leveled and slowed to 250 KIAS by 8000 ft. Captain apparently saw it coming and did not alert me in time to prevent speed violation. Explanation was 'he wanted to see if I would notice.'
Original NASA ASRS Text
Title: AN ACR JET IS ASSIGNED A DIFFICULT ALT XING RESTR. THE FO MUST DSND FROM FL330 AND CROSS JOT VOR AT 6000 FT, WITH LESS THAN 50 MI IN DISTANCE. THE ACFT IS DSNDED TO 9000 FT AT 300 KTS BEFORE THE FO REALIZES HIS MISTAKE. THE CAPT SAID NOTHING ABOUT THE SPD DEV.
Narrative: ASSIGNED A DIFFICULT XING RESTR FROM FL330 TO CROSS JOT VOR AT 6000 FT. LESS THAN 50 NM TO ACCOMPLISH. FULL SPD BRAKES, 4000-5000 FPM DSCNT RATE AT 300 KIAS. INADVERTENTLY DSNDED BELOW 10000 FT AT THIS SPD. REALIZED AT ABOUT 9000 FT AND LEVELED AND SLOWED TO 250 KIAS BY 8000 FT. CAPT APPARENTLY SAW IT COMING AND DID NOT ALERT ME IN TIME TO PREVENT SPD VIOLATION. EXPLANATION WAS 'HE WANTED TO SEE IF I WOULD NOTICE.'
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.