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Air carrier B727 issued 10000 ft on departure climb out. Controller misses incorrect readback and B727 climbs to 11000 ft. Conflicting with en route DH8 also at 11000 ft.
| Attributes | |
| ACN | 421039 |
| Time | |
| Date | 199811 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : roc airport : buf |
| State Reference | NY |
| Altitude | msl bound lower : 11000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B727-100 |
| Route In Use | departure other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8 Series Undifferentiated or Other Model |
| Flight Phase | descent other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Experience | controller radar : 14 flight time total : 30 |
| ASRS Report | 421039 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Supplementary | |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft Y, wbound, descending to 11000 ft, inbound to buf. Aircraft X departed roc, left turn eastbound climbing to 10000 ft as per LOA (so I thought). B727 checked on 5700 ft climbing to 11000 ft. Controller missed erroneous altitude assignment. Aircraft X conflicted at 11000 ft approximately 2 mins later as B727 and DHC8 both leveled at 11000 ft. Pilot of B727 was asked to verify level at 11000 ft, replied negative, assigned 11000 ft. Tapes were pulled -- error noted. Aircraft X advised RA from TCASII. Traffic was called to both aircraft prior to operational error. Aircraft X did not question being cleared to same altitude as traffic.
Original NASA ASRS Text
Title: ACR B727 ISSUED 10000 FT ON DEP CLBOUT. CTLR MISSES INCORRECT READBACK AND B727 CLBS TO 11000 FT. CONFLICTING WITH ENRTE DH8 ALSO AT 11000 FT.
Narrative: ACFT Y, WBOUND, DSNDING TO 11000 FT, INBOUND TO BUF. ACFT X DEPARTED ROC, L TURN EBOUND CLBING TO 10000 FT AS PER LOA (SO I THOUGHT). B727 CHKED ON 5700 FT CLBING TO 11000 FT. CTLR MISSED ERRONEOUS ALT ASSIGNMENT. ACFT X CONFLICTED AT 11000 FT APPROX 2 MINS LATER AS B727 AND DHC8 BOTH LEVELED AT 11000 FT. PLT OF B727 WAS ASKED TO VERIFY LEVEL AT 11000 FT, REPLIED NEGATIVE, ASSIGNED 11000 FT. TAPES WERE PULLED -- ERROR NOTED. ACFT X ADVISED RA FROM TCASII. TFC WAS CALLED TO BOTH ACFT PRIOR TO OPERROR. ACFT X DID NOT QUESTION BEING CLRED TO SAME ALT AS 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.