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An F100 flight crew is advised by ZFW controller that they have passed the addvl intersection during a malfunction of their FMS-IRS system while on their arrival procedure into dfw, tx.
| Attributes | |
| ACN | 504480 |
| Time | |
| Date | 200103 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : zfw.artcc |
| State Reference | TX |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw.artcc tower : fll.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Fokker 100 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | cruise : level |
| Route In Use | arrival star : n/s |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 504480 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : clearance non adherence : published procedure other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued advisory flight crew : overrode automation other |
| Consequence | faa : reviewed incident with flight crew other other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Navigation ird/FMS discrepancy with raw data. ATC advised we were past addvl, we are showing 25 mi to go. Dfw clear. Raw data localizer and GS used for landing. Write-up discrepancy of approximately 30 mi difference between raw and FMS/IRS. ATC very cooperative, no phone numbers exchanged.
Original NASA ASRS Text
Title: AN F100 FLC IS ADVISED BY ZFW CTLR THAT THEY HAVE PASSED THE ADDVL INTXN DURING A MALFUNCTION OF THEIR FMS-IRS SYS WHILE ON THEIR ARR PROC INTO DFW, TX.
Narrative: NAV IRD/FMS DISCREPANCY WITH RAW DATA. ATC ADVISED WE WERE PAST ADDVL, WE ARE SHOWING 25 MI TO GO. DFW CLR. RAW DATA LOC AND GS USED FOR LNDG. WRITE-UP DISCREPANCY OF APPROX 30 MI DIFFERENCE BTWN RAW AND FMS/IRS. ATC VERY COOPERATIVE, NO PHONE NUMBERS EXCHANGED.
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.