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Flight crew of a jetstream 41 overshot crossing restr, resulting in ARTCC controller questioning their altitude as they passed the fix.
| Attributes | |
| ACN | 494503 |
| Time | |
| Date | 200012 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : mrb.vortac |
| State Reference | WV |
| Altitude | msl bound lower : 8000 msl bound upper : 9000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Jetstream 41 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | descent : vacating altitude |
| Route In Use | enroute airway : v39.airway |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 190 flight time total : 4555 flight time type : 1300 |
| ASRS Report | 494503 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 13000 flight time type : 8000 |
| ASRS Report | 494400 |
| Events | |
| Anomaly | altitude deviation : overshoot altitude deviation : crossing restriction not met non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued alert |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During a flight from new york lga airport to washington dulles, we were on V39 near lancaster VOR. ATC gave us a clearance to 'cross hyper intersection at 9000 ft and robrt intersection at 8000 ft.' we put 8000 ft in the altitude alerter and began the descent. We reached 9000 ft prior to hyper intersection and continued down to 8000 ft. ATC asked our altitude and we informed him 8500 ft, we immediately returned to 9000 ft and crossed hyper at that altitude. After crossing hyper at 9000 ft, we complied with the original clearance and descended to cross robrt at 8000N ft. I feel that the contributing factors to this mistake were the inoperative FMC and the fact that we put 8000 ft in the altitude alerter. If this situation should arise again, I would put the highest crossing altitude in the alerter and not descend until we confirm passing the fix.
Original NASA ASRS Text
Title: FLC OF A JETSTREAM 41 OVERSHOT XING RESTR, RESULTING IN ARTCC CTLR QUESTIONING THEIR ALT AS THEY PASSED THE FIX.
Narrative: DURING A FLT FROM NEW YORK LGA ARPT TO WASHINGTON DULLES, WE WERE ON V39 NEAR LANCASTER VOR. ATC GAVE US A CLRNC TO 'CROSS HYPER INTXN AT 9000 FT AND ROBRT INTXN AT 8000 FT.' WE PUT 8000 FT IN THE ALT ALERTER AND BEGAN THE DSCNT. WE REACHED 9000 FT PRIOR TO HYPER INTXN AND CONTINUED DOWN TO 8000 FT. ATC ASKED OUR ALT AND WE INFORMED HIM 8500 FT, WE IMMEDIATELY RETURNED TO 9000 FT AND CROSSED HYPER AT THAT ALT. AFTER XING HYPER AT 9000 FT, WE COMPLIED WITH THE ORIGINAL CLRNC AND DSNDED TO CROSS ROBRT AT 8000N FT. I FEEL THAT THE CONTRIBUTING FACTORS TO THIS MISTAKE WERE THE INOP FMC AND THE FACT THAT WE PUT 8000 FT IN THE ALT ALERTER. IF THIS SIT SHOULD ARISE AGAIN, I WOULD PUT THE HIGHEST XING ALT IN THE ALERTER AND NOT DSND UNTIL WE CONFIRM PASSING THE FIX.
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.