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A B757 departing sjc, ca, on the loupe nine departure turns early because the captain misreads the DME.
| Attributes | |
| ACN | 385140 |
| Time | |
| Date | 199711 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sjc |
| State Reference | CA |
| Altitude | msl bound lower : 1500 msl bound upper : 1500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : oak |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : initial climbout : intermediate altitude |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : atp pilot : instrument |
| ASRS Report | 385140 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : published procedure other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | none taken : insufficient time none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We had briefed the loupe nine departure from runway 30L which calls for a noise abatement climb and right turn at 1.8 DME to a heading of 120 degrees. Captain misread DME readout and directed first officer to hit 'heading select' at about .5 DME. We turned too early and may have overflown a noise sensitive area. NAVAID at far end of runway may have contributed to the confusion. ATC made no comment. Flight continued uneventfully.
Original NASA ASRS Text
Title: A B757 DEPARTING SJC, CA, ON THE LOUPE NINE DEP TURNS EARLY BECAUSE THE CAPT MISREADS THE DME.
Narrative: WE HAD BRIEFED THE LOUPE NINE DEP FROM RWY 30L WHICH CALLS FOR A NOISE ABATEMENT CLB AND R TURN AT 1.8 DME TO A HEADING OF 120 DEGS. CAPT MISREAD DME READOUT AND DIRECTED FO TO HIT 'HEADING SELECT' AT ABOUT .5 DME. WE TURNED TOO EARLY AND MAY HAVE OVERFLOWN A NOISE SENSITIVE AREA. NAVAID AT FAR END OF RWY MAY HAVE CONTRIBUTED TO THE CONFUSION. ATC MADE NO COMMENT. FLT CONTINUED UNEVENTFULLY.
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.