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Heading track deviation by a B737-300 flight crew when misreading the departure procedure and the intentions of their revised pre departure clearance when departing on the idale RNAV two departure over oal from las, nv.
| Attributes | |
| ACN | 589631 |
| Time | |
| Date | 200308 |
| Day | Sat |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| State Reference | NV |
| Altitude | msl single value : 15000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : l30.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure sid : idale rnav |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 589631 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | non adherence : clearance non adherence : published procedure other spatial deviation |
| Independent Detector | atc equipment other atc equipment : radar other controllera |
| Resolutory Action | controller : issued advisory controller : issued new clearance flight crew : returned to original clearance |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | ATC Human Performance FAA Flight Crew Human Performance Chart Or Publication |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Filed departure route was IDALE2. The pre departure clearance has a revised segment, IDALE2 bikkr oal. We assumed this meant to proceed from bikkr direct oal. We deleted shead intersection from the FMC. Upon reaching bikkr, we turned toward oal. At that time, ATC advised us that we should be turning to shead. We quickly complied with their request. They said a lot of aircraft were doing that and asked us to call them upon arrival in sfo. I called ATC and was advised that they have had this occur many times on this RNAV departure and considered the event as a local equipment problem. He advised me that no pilot deviation action would be taken. I suggested that the revised pre departure clearance would have been easier to understand if they listed it as idale 2 oal transition.
Original NASA ASRS Text
Title: HEADING TRACK DEV BY A B737-300 FLT CREW WHEN MISREADING THE DEP PROC AND THE INTENTIONS OF THEIR REVISED PDC WHEN DEPARTING ON THE IDALE RNAV TWO DEP OVER OAL FROM LAS, NV.
Narrative: FILED DEP RTE WAS IDALE2. THE PDC HAS A REVISED SEGMENT, IDALE2 BIKKR OAL. WE ASSUMED THIS MEANT TO PROCEED FROM BIKKR DIRECT OAL. WE DELETED SHEAD INTXN FROM THE FMC. UPON REACHING BIKKR, WE TURNED TOWARD OAL. AT THAT TIME, ATC ADVISED US THAT WE SHOULD BE TURNING TO SHEAD. WE QUICKLY COMPLIED WITH THEIR REQUEST. THEY SAID A LOT OF ACFT WERE DOING THAT AND ASKED US TO CALL THEM UPON ARR IN SFO. I CALLED ATC AND WAS ADVISED THAT THEY HAVE HAD THIS OCCUR MANY TIMES ON THIS RNAV DEP AND CONSIDERED THE EVENT AS A LCL EQUIP PROB. HE ADVISED ME THAT NO PLTDEV ACTION WOULD BE TAKEN. I SUGGESTED THAT THE REVISED PDC WOULD HAVE BEEN EASIER TO UNDERSTAND IF THEY LISTED IT AS IDALE 2 OAL TRANSITION.
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.