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A fatigued air carrier crew approached anc and disconnected the aircraft from a coupled RNAV approach; descended low and off the final approach course before they caught the error and corrected.
| Attributes | |
| ACN | 856191 |
| Time | |
| Date | 200910 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ANC.Airport |
| State Reference | AK |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Private Flight Crew Multiengine Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Commercial Flight Crew Flight Engineer Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 180 Flight Crew Total 8000 Flight Crew Type 1200 |
| Events | |
| Anomaly | Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types Inflight Event / Encounter CFTT / CFIT |
Narrative:
I was pilot not flying. First officer was pilot flying on a practice RNAV runway 07R approach at anc. There was also a relief pilot onboard. Flight conditions were VFR. The crew had all been up for about 24 hours and this was the end of a 10-hour flight. We were established and protected on the approach in 'prof' and 'navigation.' I was heads down completing the 'approach' and 'before landing' checklists. The pilot flying took the plane out of 'prof' to idle descent and disconnected the autopilot. I realized that we had descended to 1200 ft and were left of centerline. We were correcting the error and ATC called informing us that we were at 1200 ft. I replied to ATC that we were correcting. We continued visually and landed under visual conditions. Crew fatigue was a contributing factor to the event.
Original NASA ASRS Text
Title: A fatigued air carrier crew approached ANC and disconnected the aircraft from a coupled RNAV approach; descended low and off the final approach course before they caught the error and corrected.
Narrative: I was pilot not flying. First Officer was pilot flying on a practice RNAV Runway 07R approach at ANC. There was also a relief pilot onboard. Flight conditions were VFR. The crew had all been up for about 24 hours and this was the end of a 10-hour flight. We were established and protected on the approach in 'PROF' and 'NAV.' I was heads down completing the 'Approach' and 'Before Landing' checklists. The pilot flying took the plane out of 'PROF' to idle descent and disconnected the autopilot. I realized that we had descended to 1200 FT and were left of centerline. We were correcting the error and ATC called informing us that we were at 1200 FT. I replied to ATC that we were correcting. We continued visually and landed under visual conditions. Crew fatigue was a contributing factor to the event.
Data retrieved from NASA's ASRS site as of April 2012 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.