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Heading track deviation when a B767 first officer misinterps the clearance from ord approach controller while approaching krena intersection, 35 NM northwest of ord, il.
| Attributes | |
| ACN | 543606 |
| Time | |
| Date | 200204 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | intersection : krena |
| State Reference | IL |
| Aircraft 1 | |
| Controlling Facilities | tracon : c90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Route In Use | arrival star : jvl.jvl4 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : c90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 543606 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | non adherence : clearance non adherence : published procedure other anomaly other other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : separated traffic controller : issued new clearance none taken : detected after the fact |
| Consequence | other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
A few mi from krena, ord controller said 'direct ahead.' I was puzzled by the term 'direct ahead' so I paused to query. The radio was blocked by multiple xmissions. After the radio chatter cleared, I asked ord if we were cleared direct ahead? He said yes, and I answered 'aircraft Y heavy cleared present heading.' after a few mins, ord came back to us and asked if we were going direct chicago. We told him we verified twice that he wanted us to go present heading. He then vectored us around a departing aircraft (maybe 20 mi from us). The rest of the approach was uneventful. This is a case of communication breakdown and what I thought at the time was nonstandard phraseology.
Original NASA ASRS Text
Title: HDG TRACK DEV WHEN A B767 FO MISINTERPS THE CLRNC FROM ORD APCH CTLR WHILE APCHING KRENA INTXN, 35 NM NW OF ORD, IL.
Narrative: A FEW MI FROM KRENA, ORD CTLR SAID 'DIRECT AHEAD.' I WAS PUZZLED BY THE TERM 'DIRECT AHEAD' SO I PAUSED TO QUERY. THE RADIO WAS BLOCKED BY MULTIPLE XMISSIONS. AFTER THE RADIO CHATTER CLRED, I ASKED ORD IF WE WERE CLRED DIRECT AHEAD? HE SAID YES, AND I ANSWERED 'ACFT Y HVY CLRED PRESENT HDG.' AFTER A FEW MINS, ORD CAME BACK TO US AND ASKED IF WE WERE GOING DIRECT CHICAGO. WE TOLD HIM WE VERIFIED TWICE THAT HE WANTED US TO GO PRESENT HDG. HE THEN VECTORED US AROUND A DEPARTING ACFT (MAYBE 20 MI FROM US). THE REST OF THE APCH WAS UNEVENTFUL. THIS IS A CASE OF COM BREAKDOWN AND WHAT I THOUGHT AT THE TIME WAS NONSTANDARD PHRASEOLOGY.
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.