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B737 flight crew was instructed to taxi to 'spot 1.' flight crew inadvertently passed the desired spot; which is not depicted on the airport diagram.
| Attributes | |
| ACN | 773298 |
| Time | |
| Date | 200802 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : iah.airport |
| State Reference | TX |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| 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 pilot : flight engineer |
| Experience | flight time last 90 days : 240 flight time total : 22000 flight time type : 10000 |
| ASRS Report | 773298 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : ground |
| Events | |
| Anomaly | non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact |
| Supplementary | |
| Problem Areas | Chart Or Publication Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Situations | |
| Chart | airport : iah.airport |
Narrative:
We were told by ramp control to taxi to spot 1. My first officer said that he knew where spot 1 was and indicated a point on the airport diagram near our assigned takeoff runway. We started toward the spot that he indicated and switched to the correct ground frequency. Houston ground told us to stop at our present position. Houston ground told us that spot 1 was just behind us. There was no traffic conflict and houston ground then cleared us to the active runway. We noticed that the spot 1 point was not on our airport diagram chart; but later determined that the spot 1 point is depicted on a ramp chart. We also noticed that other airports show these spots on both charts; but most importantly they show the spots on the airport diagram. A '1' was indicated on the iah airport diagram near our departure runway; but it was there to illustrate a footnote. This '1' was in a circle that looked like the way a hold spot is commonly painted on the taxiway to indicate a hold spot. We recommend that these hold spots be added to the airport diagram.
Original NASA ASRS Text
Title: B737 FLT CREW WAS INSTRUCTED TO TAXI TO 'SPOT 1.' FLT CREW INADVERTENTLY PASSED THE DESIRED SPOT; WHICH IS NOT DEPICTED ON THE ARPT DIAGRAM.
Narrative: WE WERE TOLD BY RAMP CTL TO TAXI TO SPOT 1. MY FO SAID THAT HE KNEW WHERE SPOT 1 WAS AND INDICATED A POINT ON THE AIRPORT DIAGRAM NEAR OUR ASSIGNED TAKEOFF RWY. WE STARTED TOWARD THE SPOT THAT HE INDICATED AND SWITCHED TO THE CORRECT GND FREQUENCY. HOUSTON GND TOLD US TO STOP AT OUR PRESENT POSITION. HOUSTON GND TOLD US THAT SPOT 1 WAS JUST BEHIND US. THERE WAS NO TFC CONFLICT AND HOUSTON GND THEN CLRED US TO THE ACTIVE RWY. WE NOTICED THAT THE SPOT 1 POINT WAS NOT ON OUR ARPT DIAGRAM CHART; BUT LATER DETERMINED THAT THE SPOT 1 POINT IS DEPICTED ON A RAMP CHART. WE ALSO NOTICED THAT OTHER ARPTS SHOW THESE SPOTS ON BOTH CHARTS; BUT MOST IMPORTANTLY THEY SHOW THE SPOTS ON THE ARPT DIAGRAM. A '1' WAS INDICATED ON THE IAH ARPT DIAGRAM NEAR OUR DEP RWY; BUT IT WAS THERE TO ILLUSTRATE A FOOTNOTE. THIS '1' WAS IN A CIRCLE THAT LOOKED LIKE THE WAY A HOLD SPOT IS COMMONLY PAINTED ON THE TXWY TO INDICATE A HOLD SPOT. WE RECOMMEND THAT THESE HOLD SPOTS BE ADDED TO THE AIRPORT DIAGRAM.
Data retrieved from NASA's ASRS site as of May 2009 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.