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EMB175 flight crew has track deviation believing revised routing via two radials is the same as via intersection zuucs in the filed flight plan. It is not.
| Attributes | |
| ACN | 808080 |
| Time | |
| Date | 200810 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | intersection : zuucs |
| State Reference | PA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Embraer Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 808080 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Events | |
| Anomaly | non adherence : clearance other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued advisory flight crew : returned to original clearance |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
First officer received full route clearance. Thought it was identical to as filed clearance and had a long discussion with ATC about the fact that it was indeed just like the 'as filed' flight plan. ATC agreed which muddied the waters a bit. Entered as filed clearance as flight plan. Both plans were nearly identical. ATC caught slight deviation when we left zuucs intersection as we should have been slightly more west of course. We returned to correct flight plan by heading a little more west. I called ATC on arrival (my request to contact them) and they said no harm done; forget about it. The only way to have caught this one would have been to review line by line the flight plan in box to catch the fact that the 2 intersecting radials given by ATC in full route clearance did indeed not identify intersection zuucs. On plan view when I reviewed flight plan the 2 flight plans were almost identical; the full route we should have been on only slightly more west than the as filed that was mistakenly entered into the box.
Original NASA ASRS Text
Title: EMB175 FLT CREW HAS TRACK DEV BELIEVING REVISED ROUTING VIA TWO RADIALS IS THE SAME AS VIA INTERSECTION ZUUCS IN THE FILED FLIGHT PLAN. IT IS NOT.
Narrative: FO RECEIVED FULL RTE CLRNC. THOUGHT IT WAS IDENTICAL TO AS FILED CLRNC AND HAD A LONG DISCUSSION WITH ATC ABOUT THE FACT THAT IT WAS INDEED JUST LIKE THE 'AS FILED' FLT PLAN. ATC AGREED WHICH MUDDIED THE WATERS A BIT. ENTERED AS FILED CLRNC AS FLT PLAN. BOTH PLANS WERE NEARLY IDENTICAL. ATC CAUGHT SLIGHT DEV WHEN WE LEFT ZUUCS INTXN AS WE SHOULD HAVE BEEN SLIGHTLY MORE W OF COURSE. WE RETURNED TO CORRECT FLT PLAN BY HDG A LITTLE MORE W. I CALLED ATC ON ARR (MY REQUEST TO CONTACT THEM) AND THEY SAID NO HARM DONE; FORGET ABOUT IT. THE ONLY WAY TO HAVE CAUGHT THIS ONE WOULD HAVE BEEN TO REVIEW LINE BY LINE THE FLT PLAN IN BOX TO CATCH THE FACT THAT THE 2 INTERSECTING RADIALS GIVEN BY ATC IN FULL RTE CLRNC DID INDEED NOT IDENT INTXN ZUUCS. ON PLAN VIEW WHEN I REVIEWED FLT PLAN THE 2 FLT PLANS WERE ALMOST IDENTICAL; THE FULL RTE WE SHOULD HAVE BEEN ON ONLY SLIGHTLY MORE W THAN THE AS FILED THAT WAS MISTAKENLY ENTERED INTO THE BOX.
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.