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A B737-200 ferry crew is so absorbed in an aircraft equipment problem that the PIC overlooked a navigational error and reported in to ATC over the next check point 8 mins early while on frequency with commercial radio, sfo, ca.
| Attributes | |
| ACN | 588141 |
| Time | |
| Date | 200307 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : zoa.artcc |
| State Reference | CA |
| Altitude | msl single value : 34000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Route In Use | enroute : pacific enroute airway : r465.airway |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 9500 flight time type : 4500 |
| ASRS Report | 588141 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : published procedure other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Maintenance Human Performance Environmental Factor Aircraft Company |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While en route, between compulsory waypoints, my first officer and I became distracted due to multiple aircraft system problems. These problems had the potential to adversely affect the completion of our flight. Because we became so preoccupied with our system problems, we did not realize that we were going to arrive at our next compulsory waypoint early. As we crossed the waypoint, we realized that we had arrived 8 mins early due to an increase in our tailwinds. We failed to give ATC via commercial radio, prior to reaching the fix, an amended ETA. (The first officer was hand flying the aircraft while I was troubleshooting the system problems.) I promptly gave my position report to commercial radio, but was later questioned about the 8 min discrepancy. ATC via commercial radio asked us if we had increased our speed. I reported, negative, but we have picked up some good tailwinds. I realized later that the 8 min discrepancy had actually been a 5 min error due to a calculation error I had made. In conclusion, the system problems in the aircraft had distracted us so much that we gave less attention to our navigation and time. Also, the aircraft should have been prepped better for this ferry flight.
Original NASA ASRS Text
Title: A B737-200 FERRY CREW IS SO ABSORBED IN AN ACFT EQUIP PROB THAT THE PIC OVERLOOKED A NAVIGATIONAL ERROR AND RPTED IN TO ATC OVER THE NEXT CHK POINT 8 MINS EARLY WHILE ON FREQ WITH COMMERCIAL RADIO, SFO, CA.
Narrative: WHILE ENRTE, BTWN COMPULSORY WAYPOINTS, MY FO AND I BECAME DISTRACTED DUE TO MULTIPLE ACFT SYS PROBS. THESE PROBS HAD THE POTENTIAL TO ADVERSELY AFFECT THE COMPLETION OF OUR FLT. BECAUSE WE BECAME SO PREOCCUPIED WITH OUR SYS PROBS, WE DID NOT REALIZE THAT WE WERE GOING TO ARRIVE AT OUR NEXT COMPULSORY WAYPOINT EARLY. AS WE CROSSED THE WAYPOINT, WE REALIZED THAT WE HAD ARRIVED 8 MINS EARLY DUE TO AN INCREASE IN OUR TAILWINDS. WE FAILED TO GIVE ATC VIA COMMERCIAL RADIO, PRIOR TO REACHING THE FIX, AN AMENDED ETA. (THE FO WAS HAND FLYING THE ACFT WHILE I WAS TROUBLESHOOTING THE SYS PROBS.) I PROMPTLY GAVE MY POS RPT TO COMMERCIAL RADIO, BUT WAS LATER QUESTIONED ABOUT THE 8 MIN DISCREPANCY. ATC VIA COMMERCIAL RADIO ASKED US IF WE HAD INCREASED OUR SPD. I RPTED, NEGATIVE, BUT WE HAVE PICKED UP SOME GOOD TAILWINDS. I REALIZED LATER THAT THE 8 MIN DISCREPANCY HAD ACTUALLY BEEN A 5 MIN ERROR DUE TO A CALCULATION ERROR I HAD MADE. IN CONCLUSION, THE SYS PROBS IN THE ACFT HAD DISTRACTED US SO MUCH THAT WE GAVE LESS ATTN TO OUR NAV AND TIME. ALSO, THE ACFT SHOULD HAVE BEEN PREPPED BETTER FOR THIS FERRY FLT.
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.