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Altitude deviation altitude excursion from assigned as FK100 crew had clearance interpretation readback hearback problem. Potential conflict less than standard separation.
| Attributes | |
| ACN | 344052 |
| Time | |
| Date | 199608 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : zdc |
| State Reference | DC |
| Altitude | msl bound lower : 28000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Fokker 100 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | other : unknown |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 125 flight time total : 18000 flight time type : 1800 |
| ASRS Report | 344052 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 160 flight time total : 14000 flight time type : 500 |
| ASRS Report | 344060 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : required legal separation other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | other |
| Consequence | faa : reviewed incident with flight crew Other |
| Miss Distance | horizontal : 24000 vertical : 0 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
Being vectored for spacing, given clear to climb from our altitude of FL270. Thought new altitude given was FL330 (filed altitude). Read back FL330 and inserted in fmp. During climb in turn to assigned heading, controller asked what altitude we were climbing to and I answered FL330. He said we were given FL280. Got TA on TCASII as we passed about 4 NM behind other aircraft that was at FL290. Called ATC from lga and talked to supervisor. He said he had listened to tape and said we were given FL280 but read back FL330 and controller did not catch the incorrect readback. First officer also thought FL330 was given to us as we confirmed altitude as per company policy. Lots of chatter on frequency. Could have heard another aircraft stepping on ATC and therefore misheard the correct altitude.
Original NASA ASRS Text
Title: ALTDEV ALT EXCURSION FROM ASSIGNED AS FK100 CREW HAD CLRNC INTERP READBACK HEARBACK PROB. POTENTIAL CONFLICT LTSS.
Narrative: BEING VECTORED FOR SPACING, GIVEN CLR TO CLB FROM OUR ALT OF FL270. THOUGHT NEW ALT GIVEN WAS FL330 (FILED ALT). READ BACK FL330 AND INSERTED IN FMP. DURING CLB IN TURN TO ASSIGNED HDG, CTLR ASKED WHAT ALT WE WERE CLBING TO AND I ANSWERED FL330. HE SAID WE WERE GIVEN FL280. GOT TA ON TCASII AS WE PASSED ABOUT 4 NM BEHIND OTHER ACFT THAT WAS AT FL290. CALLED ATC FROM LGA AND TALKED TO SUPVR. HE SAID HE HAD LISTENED TO TAPE AND SAID WE WERE GIVEN FL280 BUT READ BACK FL330 AND CTLR DID NOT CATCH THE INCORRECT READBACK. FO ALSO THOUGHT FL330 WAS GIVEN TO US AS WE CONFIRMED ALT AS PER COMPANY POLICY. LOTS OF CHATTER ON FREQ. COULD HAVE HEARD ANOTHER ACFT STEPPING ON ATC AND THEREFORE MISHEARD THE CORRECT ALT.
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.