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Purporting to have programmed the assigned route correctly into the FMS a crew is later questioned by ZLA who found their position to be other than cleared.
| Attributes | |
| ACN | 526690 |
| Time | |
| Date | 200110 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | intersection : merma |
| State Reference | CA |
| Altitude | msl single value : 19000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-500 |
| Flight Phase | descent : approach descent : vacating altitude descent : intermediate altitude |
| Route In Use | arrival star : tandy |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : multi engine |
| Experience | flight time last 90 days : 235 flight time total : 5800 flight time type : 800 |
| ASRS Report | 526690 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other spatial deviation |
| Resolutory Action | controller : issued advisory |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Altitude course deviation. We departed sjc on the sjc and were given direct flw and then the tandy 3 arrival to sna. Told to cross merma at 14000 ft. I was the PF and I programmed the FMS correctly for those instructions. Started the descent per the FMS and was on the descent profile. The PNF was busy with the ATIS. We also briefed the runway 19R ILS at sna. At about merma, ZLA questioned our position and it was discovered that our new data and LNAV did not concur. We continued to sna without incident. On the ground the captain called ZLA and explained our situation.
Original NASA ASRS Text
Title: PURPORTING TO HAVE PROGRAMMED THE ASSIGNED RTE CORRECTLY INTO THE FMS A CREW IS LATER QUESTIONED BY ZLA WHO FOUND THEIR POS TO BE OTHER THAN CLRED.
Narrative: ALT COURSE DEV. WE DEPARTED SJC ON THE SJC AND WERE GIVEN DIRECT FLW AND THEN THE TANDY 3 ARR TO SNA. TOLD TO CROSS MERMA AT 14000 FT. I WAS THE PF AND I PROGRAMMED THE FMS CORRECTLY FOR THOSE INSTRUCTIONS. STARTED THE DSCNT PER THE FMS AND WAS ON THE DSCNT PROFILE. THE PNF WAS BUSY WITH THE ATIS. WE ALSO BRIEFED THE RWY 19R ILS AT SNA. AT ABOUT MERMA, ZLA QUESTIONED OUR POS AND IT WAS DISCOVERED THAT OUR NEW DATA AND LNAV DID NOT CONCUR. WE CONTINUED TO SNA WITHOUT INCIDENT. ON THE GND THE CAPT CALLED ZLA AND EXPLAINED OUR SIT.
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.