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A cargo B767-300ER flight crew allows the FMS to take them off their initial SID routing passing pom VOR on frequency with sct, ca.
| Attributes | |
| ACN | 486190 |
| Time | |
| Date | 200009 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : pom.vortac |
| State Reference | CA |
| Altitude | msl bound lower : 10000 msl bound upper : 14000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | climbout : vacating altitude |
| Route In Use | departure sid : pomona |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 120 flight time total : 9000 flight time type : 2000 |
| ASRS Report | 486190 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : company policies non adherence : clearance other spatial deviation |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : returned to intended or assigned course flight crew : overrode automation flight crew : overcame equipment problem |
| Supplementary | |
| Problem Areas | ATC Human Performance Aircraft Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
FMC was loaded for departure with runway 8R pomona six departure. During taxi for departure on runway 26L, the FMC runway was changed to runway 26L. The departure was made on runway 26L. The departure appeared normal until after passing pom VOR. At that point the aircraft display gave us a routing other than the pomona six (gorman transition), but on hindsight appeared to be the ontario two departure. By the time we caught the error and made an immediate turn back to the pomona six track, we estimate we could have been 4.5 mi off course. One note to add is we depart with our navigation screens set at the lowest range, 10 NM. After passing pomona VOR the only thing to see on the screen would be a straight line and no next fix. Had we had a higher display range selected, the error would have been evident sooner. It wasn't until we selected a higher range that we noticed the discrepancy.
Original NASA ASRS Text
Title: A CARGO B767-300ER FLC ALLOWS THE FMS TO TAKE THEM OFF THEIR INITIAL SID ROUTING PASSING POM VOR ON FREQ WITH SCT, CA.
Narrative: FMC WAS LOADED FOR DEP WITH RWY 8R POMONA SIX DEP. DURING TAXI FOR DEP ON RWY 26L, THE FMC RWY WAS CHANGED TO RWY 26L. THE DEP WAS MADE ON RWY 26L. THE DEP APPEARED NORMAL UNTIL AFTER PASSING POM VOR. AT THAT POINT THE ACFT DISPLAY GAVE US A ROUTING OTHER THAN THE POMONA SIX (GORMAN TRANSITION), BUT ON HINDSIGHT APPEARED TO BE THE ONTARIO TWO DEP. BY THE TIME WE CAUGHT THE ERROR AND MADE AN IMMEDIATE TURN BACK TO THE POMONA SIX TRACK, WE ESTIMATE WE COULD HAVE BEEN 4.5 MI OFF COURSE. ONE NOTE TO ADD IS WE DEPART WITH OUR NAV SCREENS SET AT THE LOWEST RANGE, 10 NM. AFTER PASSING POMONA VOR THE ONLY THING TO SEE ON THE SCREEN WOULD BE A STRAIGHT LINE AND NO NEXT FIX. HAD WE HAD A HIGHER DISPLAY RANGE SELECTED, THE ERROR WOULD HAVE BEEN EVIDENT SOONER. IT WASN'T UNTIL WE SELECTED A HIGHER RANGE THAT WE NOTICED THE DISCREPANCY.
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.