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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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B757 aircraft on descent and approach to lax had map shift. Aircraft went into 10 degree bank at the shift, flight crew disconnected autoplt and flew remaining approach using raw data.
| Attributes | |
| ACN | 397595 |
| Time | |
| Date | 199803 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : lax |
| State Reference | CA |
| Altitude | msl bound lower : 9000 msl bound upper : 9000 |
| Aircraft 1 | |
| Controlling Facilities | tracon : lax |
| 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 | descent : approach descent other |
| Route In Use | arrival other arrival star : star enroute airway : lax |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 397595 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Navigational Facility |
| Air Traffic Incident | other |
| Situations | |
| Navigational Aid | Unspecified |
Narrative:
On civet 3 noticed aircraft drifting right of localizer at arnes. At suzzi aircraft went into 10 degree bank and saw map shift on screen. Disconnected autoplt and turned left to intercept to localizer. We were 1 DOT right at suzzi. Both vors were tuned to manual 113.6 and 115.7 ILS tuned to 109.9. Cleared for approach at fuelr. Flew rest of approach in expanded ILS with large map shift. This makes for a very crazy approach. After correcting back, completion of approach was on raw data.
Original NASA ASRS Text
Title: B757 ACFT ON DSCNT AND APCH TO LAX HAD MAP SHIFT. ACFT WENT INTO 10 DEG BANK AT THE SHIFT, FLC DISCONNECTED AUTOPLT AND FLEW REMAINING APCH USING RAW DATA.
Narrative: ON CIVET 3 NOTICED ACFT DRIFTING R OF LOC AT ARNES. AT SUZZI ACFT WENT INTO 10 DEG BANK AND SAW MAP SHIFT ON SCREEN. DISCONNECTED AUTOPLT AND TURNED L TO INTERCEPT TO LOC. WE WERE 1 DOT R AT SUZZI. BOTH VORS WERE TUNED TO MANUAL 113.6 AND 115.7 ILS TUNED TO 109.9. CLRED FOR APCH AT FUELR. FLEW REST OF APCH IN EXPANDED ILS WITH LARGE MAP SHIFT. THIS MAKES FOR A VERY CRAZY APCH. AFTER CORRECTING BACK, COMPLETION OF APCH WAS ON RAW DATA.
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.