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LNAV disengaged for lack of further routing on the skebr RNAV 2 arrival to las, nv. The rest of the arrival had not been executed by the crew.
| Attributes | |
| ACN | 572410 |
| Time | |
| Date | 200301 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : las.airport |
| State Reference | NV |
| Altitude | agl single value : 12000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : l30.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : approach |
| Route In Use | arrival star : skebr |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| Experience | flight time last 90 days : 120 flight time total : 6000 flight time type : 5000 |
| ASRS Report | 572410 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 75 flight time total : 23000 flight time type : 20000 |
| ASRS Report | 572531 |
| Events | |
| Anomaly | non adherence : clearance non adherence : company policies non adherence : published procedure other spatial deviation |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | controller : issued advisory flight crew : returned to intended or assigned course flight crew : returned to original clearance |
| Consequence | faa : reviewed incident with flight crew other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
LNAV route interruption. On the skebr arrival into las, I noticed the HSI broke lock and the LNAV disengaged at the skebr fix. The legs page showed that the runway 25L transition had not been executed, so we were not headed towards kepec fix from skebr. I executed the transition just as approach asked if we were still on the skebr arrival. The captain had re-engaged the LNAV and we appeared to be back on course headed towards kepec. Las approach advised us to call them on the ground. After landing and talking to approach, the captain was told that there would be no formal action taken, but the incident should be reported to the company. In the future, I will not only ensure that all transitions are entered into the FMC, but that they are executed and the box 'cleaned up.'
Original NASA ASRS Text
Title: LNAV DISENGAGED FOR LACK OF FURTHER ROUTING ON THE SKEBR RNAV 2 ARR TO LAS, NV. THE REST OF THE ARR HAD NOT BEEN EXECUTED BY THE CREW.
Narrative: LNAV RTE INTERRUPTION. ON THE SKEBR ARR INTO LAS, I NOTICED THE HSI BROKE LOCK AND THE LNAV DISENGAGED AT THE SKEBR FIX. THE LEGS PAGE SHOWED THAT THE RWY 25L TRANSITION HAD NOT BEEN EXECUTED, SO WE WERE NOT HEADED TOWARDS KEPEC FIX FROM SKEBR. I EXECUTED THE TRANSITION JUST AS APCH ASKED IF WE WERE STILL ON THE SKEBR ARR. THE CAPT HAD RE-ENGAGED THE LNAV AND WE APPEARED TO BE BACK ON COURSE HEADED TOWARDS KEPEC. LAS APCH ADVISED US TO CALL THEM ON THE GND. AFTER LNDG AND TALKING TO APCH, THE CAPT WAS TOLD THAT THERE WOULD BE NO FORMAL ACTION TAKEN, BUT THE INCIDENT SHOULD BE RPTED TO THE COMPANY. IN THE FUTURE, I WILL NOT ONLY ENSURE THAT ALL TRANSITIONS ARE ENTERED INTO THE FMC, BUT THAT THEY ARE EXECUTED AND THE BOX 'CLEANED UP.'
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.