 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Runway incursion by a B737-300 flight crew when they misinterp the clearance and where to hold short of runway 9L at ord, il.
| Attributes | |
| ACN | 564048 |
| Time | |
| Date | 200210 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : ord.airport |
| State Reference | IL |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 564048 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| ASRS Report | 564051 |
| Events | |
| Anomaly | incursion : runway non adherence : company policies non adherence : clearance non adherence : far other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact other |
| Consequence | faa : reviewed incident with flight crew other |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance Environmental Factor Company |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Taxiing out to takeoff. Got assigned runway 9L. Had weight problem and needed 'kid count.' told tower we needed some time, so tower gave instructions to get us out of the way until we were ready. Both pilots understood clearance to cross runway 9L, do a 180 degree turn and hold short of runway 9L and say when we were ready. We turned on applicable lighting and crossed runway 9L after checking for traffic. After crossing, we were told that had not been our clearance and were told to do a 180 degree turn and hold short again on taxiway J, north of runway 9L. Tower said 'no problem.' we think the confusion may have stemmed from hearing tower say 'taxi straight ahead' when we were holding short of runway 9L facing north on taxiway J. We think he may have thought we were facing east on taxiway H instead, but cannot be sure what he perceived. Uneventful after this point through takeoff and departure. Supplemental information from acn 564051: although the workload was fairly high due to the weight discrepancy, both pilots were listening to ATC instructions, and both pilots understood those instructions to 'taxi straight ahead, cross runway 9L, do a left 180 degree turn and hold short on taxiway J for runway 9L.' first officer acknowledged and read back instructions. Clearly this was not what tower instructed, yet it's what we both understood.
Original NASA ASRS Text
Title: RWY INCURSION BY A B737-300 FLC WHEN THEY MISINTERP THE CLRNC AND WHERE TO HOLD SHORT OF RWY 9L AT ORD, IL.
Narrative: TAXIING OUT TO TKOF. GOT ASSIGNED RWY 9L. HAD WT PROB AND NEEDED 'KID COUNT.' TOLD TWR WE NEEDED SOME TIME, SO TWR GAVE INSTRUCTIONS TO GET US OUT OF THE WAY UNTIL WE WERE READY. BOTH PLTS UNDERSTOOD CLRNC TO CROSS RWY 9L, DO A 180 DEG TURN AND HOLD SHORT OF RWY 9L AND SAY WHEN WE WERE READY. WE TURNED ON APPLICABLE LIGHTING AND CROSSED RWY 9L AFTER CHKING FOR TFC. AFTER XING, WE WERE TOLD THAT HAD NOT BEEN OUR CLRNC AND WERE TOLD TO DO A 180 DEG TURN AND HOLD SHORT AGAIN ON TXWY J, N OF RWY 9L. TWR SAID 'NO PROB.' WE THINK THE CONFUSION MAY HAVE STEMMED FROM HEARING TWR SAY 'TAXI STRAIGHT AHEAD' WHEN WE WERE HOLDING SHORT OF RWY 9L FACING N ON TXWY J. WE THINK HE MAY HAVE THOUGHT WE WERE FACING E ON TXWY H INSTEAD, BUT CANNOT BE SURE WHAT HE PERCEIVED. UNEVENTFUL AFTER THIS POINT THROUGH TKOF AND DEP. SUPPLEMENTAL INFO FROM ACN 564051: ALTHOUGH THE WORKLOAD WAS FAIRLY HIGH DUE TO THE WT DISCREPANCY, BOTH PLTS WERE LISTENING TO ATC INSTRUCTIONS, AND BOTH PLTS UNDERSTOOD THOSE INSTRUCTIONS TO 'TAXI STRAIGHT AHEAD, CROSS RWY 9L, DO A L 180 DEG TURN AND HOLD SHORT ON TXWY J FOR RWY 9L.' FO ACKNOWLEDGED AND READ BACK INSTRUCTIONS. CLRLY THIS WAS NOT WHAT TWR INSTRUCTED, YET IT'S WHAT WE BOTH UNDERSTOOD.
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.