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Deviation from clearance route. Air carrier flight crew does not enter the complete route into the INS so it begins a slow turn back to the departure point after it crosses the last entered navigation point.
| Attributes | |
| ACN | 310740 |
| Time | |
| Date | 199507 |
| Day | Sun |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | atc facility : nud |
| State Reference | AK |
| Altitude | msl bound lower : 31000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zan |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute : other oceanic enroute : pacific |
| 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 : 9000 flight time type : 2050 |
| ASRS Report | 310740 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 12000 flight time type : 5000 |
| ASRS Report | 310848 |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Distraction in cockpit just prior to loading new set of waypoints. Aircraft came to final point and started turn back to waypoint #1. After 40 degrees of turn all 3 crew members figured out reason for the turn. A correction was initiated immediately. A backside of clock flight and a missing augmented crew member added to the fatigue level in the cockpit. Crew segment 12 hours 52 mins. Supplemental information from acn 310848: prior to last loaded INS waypoint, a flight attendant entered the cockpit (distraction). We noticed after about 45 degrees of turn at plus or minus 5 degrees of bank. This old INS doesn't consider this an error so there is no warning prior to or during this scenario.
Original NASA ASRS Text
Title: DEV FROM CLRNC RTE. ACR FLC DOES NOT ENTER THE COMPLETE RTE INTO THE INS SO IT BEGINS A SLOW TURN BACK TO THE DEP POINT AFTER IT CROSSES THE LAST ENTERED NAV POINT.
Narrative: DISTR IN COCKPIT JUST PRIOR TO LOADING NEW SET OF WAYPOINTS. ACFT CAME TO FINAL POINT AND STARTED TURN BACK TO WAYPOINT #1. AFTER 40 DEGS OF TURN ALL 3 CREW MEMBERS FIGURED OUT REASON FOR THE TURN. A CORRECTION WAS INITIATED IMMEDIATELY. A BACKSIDE OF CLOCK FLT AND A MISSING AUGMENTED CREW MEMBER ADDED TO THE FATIGUE LEVEL IN THE COCKPIT. CREW SEGMENT 12 HRS 52 MINS. SUPPLEMENTAL INFO FROM ACN 310848: PRIOR TO LAST LOADED INS WAYPOINT, A FLT ATTENDANT ENTERED THE COCKPIT (DISTR). WE NOTICED AFTER ABOUT 45 DEGS OF TURN AT PLUS OR MINUS 5 DEGS OF BANK. THIS OLD INS DOESN'T CONSIDER THIS AN ERROR SO THERE IS NO WARNING PRIOR TO OR DURING THIS SCENARIO.
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.