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Air carrier aircraft erroneously descends to wrong altitude for crossing restr while only 1 crew member at the controls.
| Attributes | |
| ACN | 452570 |
| Time | |
| Date | 199910 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| State Reference | OH |
| Altitude | msl bound lower : 28000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 15000 flight time type : 1000 |
| ASRS Report | 452570 |
| Person 2 | |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance none taken : detected after the fact |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Environmental Factor ATC Human Performance Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During flight from iam to pit, first officer left the cockpit to go to the lavatory. During this time, we were given a descent clearance from our cruise altitude of FL330 to cross 155 mi southwest of air at FL290. I thought the clearance was to cross at FL240 and wrote it down as such. While descending through FL280, center asked what our assigned altitude was. When I replied FL240, I was told that it was FL290. We were told that we could stop the descent and maintain FL280. Controller said that it was not a problem that there was no conflicting traffic.
Original NASA ASRS Text
Title: ACR ACFT ERRONEOUSLY DSNDS TO WRONG ALT FOR XING RESTR WHILE ONLY 1 CREW MEMBER AT THE CTLS.
Narrative: DURING FLT FROM IAM TO PIT, FO LEFT THE COCKPIT TO GO TO THE LAVATORY. DURING THIS TIME, WE WERE GIVEN A DSCNT CLRNC FROM OUR CRUISE ALT OF FL330 TO CROSS 155 MI SW OF AIR AT FL290. I THOUGHT THE CLRNC WAS TO CROSS AT FL240 AND WROTE IT DOWN AS SUCH. WHILE DSNDING THROUGH FL280, CTR ASKED WHAT OUR ASSIGNED ALT WAS. WHEN I REPLIED FL240, I WAS TOLD THAT IT WAS FL290. WE WERE TOLD THAT WE COULD STOP THE DSCNT AND MAINTAIN FL280. CTLR SAID THAT IT WAS NOT A PROB THAT THERE WAS NO CONFLICTING TFC.
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.