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A B757 departing sna, ca, fails to turn on course because the LNAV is not working. While the flight crew is analyzing the LNAV problem, the aircraft exceeds the cleared altitude.
| Attributes | |
| ACN | 380080 |
| Time | |
| Date | 199709 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sna |
| State Reference | CA |
| Altitude | msl bound lower : 5000 msl bound upper : 5600 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sna |
| 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 |
| Aircraft 2 | |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 380080 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 380079 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera other flight crewa |
| Resolutory Action | flight crew : became reoriented flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Departing sna on runway 19R using the noise abatement departure. At about 3000 ft the first officer, who was flying, asked for LNAV. I went to select it, but it would not. While trying to figure out the problem and reconfigure the airplane for climb, we went through the 5000 ft coastal restr to approximately 5600 ft. We began a return to 5000 ft and the controller advised that we had penetrated the restr airspace, but to continue the climb and there had been no conflict.
Original NASA ASRS Text
Title: A B757 DEPARTING SNA, CA, FAILS TO TURN ON COURSE BECAUSE THE LNAV IS NOT WORKING. WHILE THE FLC IS ANALYZING THE LNAV PROB, THE ACFT EXCEEDS THE CLRED ALT.
Narrative: DEPARTING SNA ON RWY 19R USING THE NOISE ABATEMENT DEP. AT ABOUT 3000 FT THE FO, WHO WAS FLYING, ASKED FOR LNAV. I WENT TO SELECT IT, BUT IT WOULD NOT. WHILE TRYING TO FIGURE OUT THE PROB AND RECONFIGURE THE AIRPLANE FOR CLB, WE WENT THROUGH THE 5000 FT COASTAL RESTR TO APPROX 5600 FT. WE BEGAN A RETURN TO 5000 FT AND THE CTLR ADVISED THAT WE HAD PENETRATED THE RESTR AIRSPACE, BUT TO CONTINUE THE CLB AND THERE HAD BEEN NO CONFLICT.
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.