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A MD80 FMS transitioned out of navigation to heading sel after a close-in runway change caused the crew to change runway approachs.
| Attributes | |
| ACN | 768712 |
| Time | |
| Date | 200801 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 24000 |
| Environment | |
| Flight Conditions | VMC VMC |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-88 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 768712 |
| Events | |
| Anomaly | non adherence : clearance non adherence : published procedure other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended or assigned course |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance |
| Primary Problem | Aircraft |
Narrative:
On arrival; cleared direct intersection; runway xxc selected; aircraft navigation tracking to intersection. Approach changed runway to xxl. Captain selected runway xxl from box; was briefing approach and first officer was reviewing plate. Approach asked us if we were on a 240 degree heading. Noticed aircraft was not navigation trk but was in heading sel. Have no idea why aircraft came out of navigation trk mode. Approach then turned us to new heading. Nothing else was said.
Original NASA ASRS Text
Title: A MD80 FMS TRANSITIONED OUT OF NAV TO HDG SEL AFTER A CLOSE-IN RWY CHANGE CAUSED THE CREW TO CHANGE RWY APCHS.
Narrative: ON ARR; CLRED DIRECT INTXN; RWY XXC SELECTED; ACFT NAV TRACKING TO INTXN. APCH CHANGED RWY TO XXL. CAPT SELECTED RWY XXL FROM BOX; WAS BRIEFING APCH AND FO WAS REVIEWING PLATE. APCH ASKED US IF WE WERE ON A 240 DEG HDG. NOTICED ACFT WAS NOT NAV TRK BUT WAS IN HDG SEL. HAVE NO IDEA WHY ACFT CAME OUT OF NAV TRK MODE. APCH THEN TURNED US TO NEW HDG. NOTHING ELSE WAS SAID.
Data retrieved from NASA's ASRS site as of May 2009 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.