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A G4 climbs above cleared altitude because of not hearing clearance correctly. Many vectors and altitude changes were being issued at the time by ZNY, ny, ARTCC.
| Attributes | |
| ACN | 385130 |
| Time | |
| Date | 199710 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : hpn |
| State Reference | NY |
| Altitude | msl bound lower : 15000 msl bound upper : 16800 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny |
| Operator | general aviation : corporate |
| Make Model Name | Gulfstream IV |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 10500 |
| ASRS Report | 385130 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During climb out from hpn en route to day we were given a series of vectors and climb clrncs. We had been cleared to 15000 ft when received (and read back) a clearance to FL250. The controller however wanted us to fly heading 250 degrees. Passing 15000 ft we were given a heading to 210 degrees (we were on approximately a 270 degree heading) and queried about our altitude. The controller instructed us to maintain 15000 ft and turn to heading 200 degrees. We descended back from approximately 16800 ft to 15000 ft. TCASII in our vicinity was clear of targets and no conflict with traffic was indicated. We were both reasonably sure we heard the climb clearance as FL250 and know for certain that that was what was read back. Workload and distractions in the cockpit were minimal but perhaps we just misheard the clearance because we were expecting a further climb clearance.
Original NASA ASRS Text
Title: A G4 CLBS ABOVE CLRED ALT BECAUSE OF NOT HEARING CLRNC CORRECTLY. MANY VECTORS AND ALT CHANGES WERE BEING ISSUED AT THE TIME BY ZNY, NY, ARTCC.
Narrative: DURING CLBOUT FROM HPN ENRTE TO DAY WE WERE GIVEN A SERIES OF VECTORS AND CLB CLRNCS. WE HAD BEEN CLRED TO 15000 FT WHEN RECEIVED (AND READ BACK) A CLRNC TO FL250. THE CTLR HOWEVER WANTED US TO FLY HDG 250 DEGS. PASSING 15000 FT WE WERE GIVEN A HDG TO 210 DEGS (WE WERE ON APPROX A 270 DEG HDG) AND QUERIED ABOUT OUR ALT. THE CTLR INSTRUCTED US TO MAINTAIN 15000 FT AND TURN TO HDG 200 DEGS. WE DSNDED BACK FROM APPROX 16800 FT TO 15000 FT. TCASII IN OUR VICINITY WAS CLR OF TARGETS AND NO CONFLICT WITH TFC WAS INDICATED. WE WERE BOTH REASONABLY SURE WE HEARD THE CLB CLRNC AS FL250 AND KNOW FOR CERTAIN THAT THAT WAS WHAT WAS READ BACK. WORKLOAD AND DISTRACTIONS IN THE COCKPIT WERE MINIMAL BUT PERHAPS WE JUST MISHEARD THE CLRNC BECAUSE WE WERE EXPECTING A FURTHER CLB CLRNC.
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.