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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Altitude crossing restr not quite met, but bracketed nicely. Altitude deviation altitude undershot overshot in descent. Late descent clearance.
| Attributes | |
| ACN | 353230 |
| Time | |
| Date | 199611 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : jvl |
| State Reference | WI |
| Altitude | msl bound lower : 10700 msl bound upper : 11300 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 353230 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : overshoot altitude deviation : crossing restriction not met inflight encounter other non adherence : clearance other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
ATC facility: ZAU. Location: 30 mi west of janesville. Given crossing restr of 30 mi west of janesville while proceeding direct at 11000 ft. Late assignment, tailwinds and anti- icing made restr tight. We made within 300 ft but due to high rate of descent autoplt capture mode evidently did not operate and aircraft descended slightly below 11000 ft by approximately 200-300 ft. I should have told ATC earlier that we were unable as the frequency was too busy as we got closer, and the problem could have been averted.
Original NASA ASRS Text
Title: ALT XING RESTR NOT QUITE MET, BUT BRACKETED NICELY. ALTDEV ALT UNDERSHOT OVERSHOT IN DSCNT. LATE DSCNT CLRNC.
Narrative: ATC FACILITY: ZAU. LOCATION: 30 MI W OF JANESVILLE. GIVEN XING RESTR OF 30 MI W OF JANESVILLE WHILE PROCEEDING DIRECT AT 11000 FT. LATE ASSIGNMENT, TAILWINDS AND ANTI- ICING MADE RESTR TIGHT. WE MADE WITHIN 300 FT BUT DUE TO HIGH RATE OF DSCNT AUTOPLT CAPTURE MODE EVIDENTLY DID NOT OPERATE AND ACFT DSNDED SLIGHTLY BELOW 11000 FT BY APPROX 200-300 FT. I SHOULD HAVE TOLD ATC EARLIER THAT WE WERE UNABLE AS THE FREQ WAS TOO BUSY AS WE GOT CLOSER, AND THE PROB COULD HAVE BEEN AVERTED.
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.