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Heading track deviation by a B737 flight crew on an extended overwater flight, night operation, when flying a vectored departure versus the ATC expected SID from bali, wrrr, first officer.
| Attributes | |
| ACN | 622282 |
| Time | |
| Date | 200306 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : wrrr.airport |
| State Reference | FO |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : wrrr.tower tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : relief pilot |
| Experience | flight time last 90 days : 240 flight time total : 8500 flight time type : 3400 |
| ASRS Report | 622282 |
| 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 : issued advisory none taken : anomaly accepted |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Environmental Factor ATC Human Performance |
| Primary Problem | Ambiguous |
Narrative:
On taxi out we were given the ATC clearance, 'cleared to, guam as filed XXXX (transponder code), climb and maintain FL350. We were not sure what the alpha designation was prior to the transponder code and the first officer was instructed to question the clearance which was read back the same way. Both language and poor radio equipment was a problem at this destination. After takeoff the PF turned to a heading of 060 degrees for the vector climb to 13000 ft prior to turning direct to lipot. During climb out a second controller, perhaps a supervisor, came on the radio and asked us if we were flying the lipot 1, alpha departure, which we were not. He questioned again what procedure we were given and the PNF said we were flying the normal radar vector departure. The controller made no further effort to correct the situation which we believed to be a language problem with the ground controller, who had issued the flight clearance. We were handed over to the next controller and the remainder of the flight was uneventful.
Original NASA ASRS Text
Title: HDG TRACK DEV BY A B737 FLT CREW ON AN EXTENDED OVERWATER FLT, NIGHT OP, WHEN FLYING A VECTORED DEP VERSUS THE ATC EXPECTED SID FROM BALI, WRRR, FO.
Narrative: ON TAXI OUT WE WERE GIVEN THE ATC CLRNC, 'CLRED TO, GUAM AS FILED XXXX (XPONDER CODE), CLB AND MAINTAIN FL350. WE WERE NOT SURE WHAT THE ALPHA DESIGNATION WAS PRIOR TO THE XPONDER CODE AND THE FO WAS INSTRUCTED TO QUESTION THE CLRNC WHICH WAS READ BACK THE SAME WAY. BOTH LANGUAGE AND POOR RADIO EQUIP WAS A PROB AT THIS DEST. AFTER TKOF THE PF TURNED TO A HDG OF 060 DEGS FOR THE VECTOR CLB TO 13000 FT PRIOR TO TURNING DIRECT TO LIPOT. DURING CLBOUT A SECOND CTLR, PERHAPS A SUPVR, CAME ON THE RADIO AND ASKED US IF WE WERE FLYING THE LIPOT 1, ALPHA DEP, WHICH WE WERE NOT. HE QUESTIONED AGAIN WHAT PROC WE WERE GIVEN AND THE PNF SAID WE WERE FLYING THE NORMAL RADAR VECTOR DEP. THE CTLR MADE NO FURTHER EFFORT TO CORRECT THE SIT WHICH WE BELIEVED TO BE A LANGUAGE PROB WITH THE GND CTLR, WHO HAD ISSUED THE FLT CLRNC. WE WERE HANDED OVER TO THE NEXT CTLR AND THE REMAINDER OF THE FLT WAS UNEVENTFUL.
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.