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A DA90 flight crew has a problem of interpretation of a clearance on a heading for joining the lufkin transition on the alamo 5 departure procedure. Second controller disputes their position and issues another heading.
| Attributes | |
| ACN | 391100 |
| Time | |
| Date | 199801 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sat |
| State Reference | TX |
| Altitude | msl bound lower : 14000 msl bound upper : 14000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhu |
| Operator | general aviation : personal |
| Make Model Name | Falcon 900 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other departure sid : sid enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 50 flight time total : 4500 flight time type : 700 |
| ASRS Report | 391100 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : published procedure non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
Departed sat, after a couple of vectors, we were issued a heading 060 degrees to join the lufkin transition on the alamo five departure. I understood this to mean intercept the course segment between ela and lfk vors. (See enclosed SID) after being handed off to next center controller, he rapidly issued a route clearance. I asked for the routing again and he stated we were north of course and needed to make a right turn to rejoin the san antonio five departure. At this point we realized he expected us to join the departure by intercepting the sat 081 degree radial (towards seeds intersection). Perhaps a better way to instruct us would have been to issue a heading to intercept a specific radial to resume the departure to eliminate any ambiguity or possible difference in interpretation. Also I will try to be more vigilant at requesting clarification when any possible ambiguities exist.
Original NASA ASRS Text
Title: A DA90 FLC HAS A PROB OF INTERP OF A CLRNC ON A HEADING FOR JOINING THE LUFKIN TRANSITION ON THE ALAMO 5 DEP PROC. SECOND CTLR DISPUTES THEIR POS AND ISSUES ANOTHER HEADING.
Narrative: DEPARTED SAT, AFTER A COUPLE OF VECTORS, WE WERE ISSUED A HDG 060 DEGS TO JOIN THE LUFKIN TRANSITION ON THE ALAMO FIVE DEP. I UNDERSTOOD THIS TO MEAN INTERCEPT THE COURSE SEGMENT BTWN ELA AND LFK VORS. (SEE ENCLOSED SID) AFTER BEING HANDED OFF TO NEXT CTR CTLR, HE RAPIDLY ISSUED A RTE CLRNC. I ASKED FOR THE ROUTING AGAIN AND HE STATED WE WERE N OF COURSE AND NEEDED TO MAKE A R TURN TO REJOIN THE SAN ANTONIO FIVE DEP. AT THIS POINT WE REALIZED HE EXPECTED US TO JOIN THE DEP BY INTERCEPTING THE SAT 081 DEG RADIAL (TOWARDS SEEDS INTXN). PERHAPS A BETTER WAY TO INSTRUCT US WOULD HAVE BEEN TO ISSUE A HEADING TO INTERCEPT A SPECIFIC RADIAL TO RESUME THE DEP TO ELIMINATE ANY AMBIGUITY OR POSSIBLE DIFFERENCE IN INTERP. ALSO I WILL TRY TO BE MORE VIGILANT AT REQUESTING CLARIFICATION WHEN ANY POSSIBLE AMBIGUITIES EXIST.
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.