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A B737-800 crew, while in the hold at fqm, were queried by ATC, when the FMS flew an unusually wide and extended outbound leg.
| Attributes | |
| ACN | 541060 |
| Time | |
| Date | 200203 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : fqm.vor |
| State Reference | PA |
| Altitude | msl single value : 21000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny.artcc tower : lvk.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : holding |
| Route In Use | arrival star : williamsport 1 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 6901 flight time type : 1864 |
| ASRS Report | 541060 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | inflight encounter : weather inflight encounter other non adherence : far non adherence : clearance non adherence : published procedure other spatial deviation |
| Independent Detector | atc equipment other atc equipment : radar other controllera other flight crewa other flight crewb |
| Resolutory Action | controller : issued alert controller : issued new clearance |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Weather Environmental Factor Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On arrival into new york airspace, I was given a hold at williamsport VOR as published. The hold was depicted on arrival 'williamsport 1 arrival' which we were flying. I entered the hold into the FMC and it depicted the holding pattern on the map display. The captain and I agreed it was correct. As we approached fqm, ATC gave us a descent to approximately FL270 and then down to FL210. I advised them we were entering hold. ATC asked us to pick up descent rate and I complied. The FMC flew a very wide and extended outbound leg, due to winds from the west at 150 KTS. Just as we were about to turn inbound, ATC called and asked if we were established in the hold because he showed us well south and west of where we should be. We advised that we were compensating for high wind which we had and were about to turn inbound. Started turn in and was then cleared out of hold to ewr. I believe FMC overcompensated for high winds and we flew further outbound than we should have. My mistakes were relying on FMC to do a proper hold in very high wind and not keeping track of time and distance of outbound leg. I need to monitor FMC better and take over quicker if I see it going astray!
Original NASA ASRS Text
Title: A B737-800 CREW, WHILE IN THE HOLD AT FQM, WERE QUERIED BY ATC, WHEN THE FMS FLEW AN UNUSUALLY WIDE AND EXTENDED OUTBOUND LEG.
Narrative: ON ARR INTO NEW YORK AIRSPACE, I WAS GIVEN A HOLD AT WILLIAMSPORT VOR AS PUBLISHED. THE HOLD WAS DEPICTED ON ARR 'WILLIAMSPORT 1 ARR' WHICH WE WERE FLYING. I ENTERED THE HOLD INTO THE FMC AND IT DEPICTED THE HOLDING PATTERN ON THE MAP DISPLAY. THE CAPT AND I AGREED IT WAS CORRECT. AS WE APCHED FQM, ATC GAVE US A DSCNT TO APPROX FL270 AND THEN DOWN TO FL210. I ADVISED THEM WE WERE ENTERING HOLD. ATC ASKED US TO PICK UP DSCNT RATE AND I COMPLIED. THE FMC FLEW A VERY WIDE AND EXTENDED OUTBOUND LEG, DUE TO WINDS FROM THE W AT 150 KTS. JUST AS WE WERE ABOUT TO TURN INBOUND, ATC CALLED AND ASKED IF WE WERE ESTABLISHED IN THE HOLD BECAUSE HE SHOWED US WELL S AND W OF WHERE WE SHOULD BE. WE ADVISED THAT WE WERE COMPENSATING FOR HIGH WIND WHICH WE HAD AND WERE ABOUT TO TURN INBOUND. STARTED TURN IN AND WAS THEN CLRED OUT OF HOLD TO EWR. I BELIEVE FMC OVERCOMPENSATED FOR HIGH WINDS AND WE FLEW FURTHER OUTBOUND THAN WE SHOULD HAVE. MY MISTAKES WERE RELYING ON FMC TO DO A PROPER HOLD IN VERY HIGH WIND AND NOT KEEPING TRACK OF TIME AND DISTANCE OF OUTBOUND LEG. I NEED TO MONITOR FMC BETTER AND TAKE OVER QUICKER IF I SEE IT GOING ASTRAY!
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.