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An air carrier B727 flight crew is informed by controllers in 2 different artccs that they were off course by approximately 30 NM. A later ground check showed that both ONS system were 31 NM off.
| Attributes | |
| ACN | 344120 |
| Time | |
| Date | 199608 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : pta |
| State Reference | FO |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : mdcs artcc : zma |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute : atlantic enroute : other oceanic |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 344120 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : clearance non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : unable other other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
From swimm direct to sekar had navigation error of up to 30 mi. ZMA cleared us to sdq, center said we still had 30 mi to go. Pta VOR was usable at 85 mi. To find position flew to pta and on deck found navigation position in both ONS to be 31 mi off.
Original NASA ASRS Text
Title: AN ACR B727 FLC IS INFORMED BY CTLRS IN 2 DIFFERENT ARTCCS THAT THEY WERE OFF COURSE BY APPROX 30 NM. A LATER GND CHK SHOWED THAT BOTH ONS SYS WERE 31 NM OFF.
Narrative: FROM SWIMM DIRECT TO SEKAR HAD NAV ERROR OF UP TO 30 MI. ZMA CLRED US TO SDQ, CTR SAID WE STILL HAD 30 MI TO GO. PTA VOR WAS USABLE AT 85 MI. TO FIND POS FLEW TO PTA AND ON DECK FOUND NAV POS IN BOTH ONS TO BE 31 MI OFF.
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.