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Flight crew of a B757-200 failed to make crossing altitude restr and notified ATC on 2 occasions that they were too close to make the descent in time. However, the controller's acknowledgement both times was not clear as to whether there would be a problem or not.
| Attributes | |
| ACN | 403009 |
| Time | |
| Date | 199805 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : hto |
| State Reference | NY |
| Altitude | msl bound lower : 20000 msl bound upper : 20900 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | enroute airway : j121 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 18000 flight time type : 2500 |
| ASRS Report | 403009 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 11000 flight time type : 1200 |
| ASRS Report | 403010 |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met altitude deviation : undershoot non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Deviation Pilot Deviation |
Narrative:
Descent clearance given based on fix behind aircraft (hto) with insufficient distance to comfortably accommodate. Requested relief. Vague reply from ZBW controller frequency 124.52. Advised center wouldn't be able to comply. Received another vague controller response as to relieving the restr. We leveled within 2 mi of fix with up to 6000 FPM rate of descent.
Original NASA ASRS Text
Title: FLC OF A B757-200 FAILED TO MAKE XING ALT RESTR AND NOTIFIED ATC ON 2 OCCASIONS THAT THEY WERE TOO CLOSE TO MAKE THE DSCNT IN TIME. HOWEVER, THE CTLR'S ACKNOWLEDGEMENT BOTH TIMES WAS NOT CLR AS TO WHETHER THERE WOULD BE A PROB OR NOT.
Narrative: DSCNT CLRNC GIVEN BASED ON FIX BEHIND ACFT (HTO) WITH INSUFFICIENT DISTANCE TO COMFORTABLY ACCOMMODATE. REQUESTED RELIEF. VAGUE REPLY FROM ZBW CTLR FREQ 124.52. ADVISED CTR WOULDN'T BE ABLE TO COMPLY. RECEIVED ANOTHER VAGUE CTLR RESPONSE AS TO RELIEVING THE RESTR. WE LEVELED WITHIN 2 MI OF FIX WITH UP TO 6000 FPM RATE OF DSCNT.
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.