 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
B737 flight crew reports track deviation due to misinterpretation of revised segment of pre departure clearance.
| Attributes | |
| ACN | 795136 |
| Time | |
| Date | 200807 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zid.artcc |
| State Reference | IN |
| Altitude | msl single value : 34000 |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 128 flight time type : 400 |
| ASRS Report | 795136 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 150 flight time type : 22000 |
| ASRS Report | 795132 |
| Events | |
| Anomaly | non adherence : clearance other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended or assigned course |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Received non-standard routing on release. Pre departure clearance showed our routing with a change. The change was as follows: TERPZ1 ldn J134 colns J6 hvq. The original route was the same as the (--) change routing with the exception of J6 hvq. My interpretation of the pre departure clearance change was that ATC wanted me to go J6 hvq instead of J6 bwg. I inserted hvq on top of bwg on the route page which deleted J6 bwg and sent us hvq direct mem. ZID contacted us and asked us why we were 15 NM south of J6; to which we responded that we were direct mem on our flight plan route. He then cleared us direct mem and asked us to contact ZID upon landing. J6 goes over hvq already en route to bwg. When I got the change; I thought that they wanted me to go to hvq instead of bwg followed by mem. Why would they give me a change to our routing that actually contained no change at all. I briefed the captain at the gate of our pre departure clearance routing change and we acknowledged it on the route page. In the future I will now question any changes to the pre departure clearance with clearance delivery.
Original NASA ASRS Text
Title: B737 FLT CREW REPORTS TRACK DEV DUE TO MISINTERPRETATION OF REVISED SEGMENT OF PDC.
Narrative: RECEIVED NON-STANDARD ROUTING ON RELEASE. PDC SHOWED OUR ROUTING WITH A CHANGE. THE CHANGE WAS AS FOLLOWS: TERPZ1 LDN J134 COLNS J6 HVQ. THE ORIGINAL RTE WAS THE SAME AS THE (--) CHANGE ROUTING WITH THE EXCEPTION OF J6 HVQ. MY INTERP OF THE PDC CHANGE WAS THAT ATC WANTED ME TO GO J6 HVQ INSTEAD OF J6 BWG. I INSERTED HVQ ON TOP OF BWG ON THE RTE PAGE WHICH DELETED J6 BWG AND SENT US HVQ DIRECT MEM. ZID CONTACTED US AND ASKED US WHY WE WERE 15 NM S OF J6; TO WHICH WE RESPONDED THAT WE WERE DIRECT MEM ON OUR FLT PLAN RTE. HE THEN CLRED US DIRECT MEM AND ASKED US TO CONTACT ZID UPON LNDG. J6 GOES OVER HVQ ALREADY ENRTE TO BWG. WHEN I GOT THE CHANGE; I THOUGHT THAT THEY WANTED ME TO GO TO HVQ INSTEAD OF BWG FOLLOWED BY MEM. WHY WOULD THEY GIVE ME A CHANGE TO OUR ROUTING THAT ACTUALLY CONTAINED NO CHANGE AT ALL. I BRIEFED THE CAPT AT THE GATE OF OUR PDC ROUTING CHANGE AND WE ACKNOWLEDGED IT ON THE RTE PAGE. IN THE FUTURE I WILL NOW QUESTION ANY CHANGES TO THE PDC WITH CLRNC DELIVERY.
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.