G2 CREW HAD TRACK DEV.

Date: 1998-11 · Aircraft: Gulfstream II (G1159)

Anomalies: deviation-track-heading-all-types|deviation-discrepancy-procedural-clearance|deviation-discrepancy-procedural-far|deviation-discrepancy-procedural-published-material-policy

Synopsis

G2 CREW HAD TRACK DEV.

Narrative

ON NOV/XA/98 WE DEPARTED VNY FOR SFO. WE WERE ISSUED THE CLRNC OF THE CANOGA 7 DEP AVENAL TRANSITION AS FILED. THE ACFT HAD JUST COME IN AND WE WERE QUICK TURNING TO GO TO SFO. THE PNF PROGRAMMED THE FMS'S WHILE I TENDED TO THE FUELING OF THE ACFT. ON TAXI WE BRIEFED THE DEP SID AND ROUTING. WE DEPARTED ON THE CANOGA 7 DEP WHICH GOES OVER GMN VOR; COREZ INTXN AND THEN AVENAL VOR. AS WE DEPARTED GMN VOR (ABOUT 30 NM NW OF GMN) THE CTLR ASKED US IF WE WERE ON THE SID. WE REPLIED 'AFFIRMATIVE.' THE CTLR FURTHER QUERIED 'WHAT IS YOUR HDG?' WE REPLIED '295 DEG HDG.' THE CTLR SAID 'ROGER; TURN R HDG 310 DEGS AND EXPEDITE YOUR TURN.' WE PROMPTLY COMPLIED. WE OBSERVED ANOTHER ACFT ON TCASII BUT AT NO TIME DID ANY CONFLICT EXIST. IN FACT; WE WERE NEVER ISSUED AN ALERT BY THE TCASII OR BY THE CTLR. THE CTLR THEN CLRED US DIRECT TO BSR AND THE FLT CONTINUED WITHOUT INCIDENT. THE CTLR MENTIONED; PRIOR TO THE HDOF; THAT IT IS IMPORTANT TO NAV THE SID BECAUSE IT KEEPS DEPS AWAY FROM THE INBOUNDS. AFTER WE LEVELED OFF; THE PNF AND I FIGURED OUT WHAT HAPPENED. WHEN HE PROGRAMMED THE FMS'S HE ACCIDENTALLY OMITTED THE FIX CALLED COREZ. THIS CAUSED THE NAV ERROR AND THE ACFT TO BE IN THE WRONG PLACE. I HAVE SINCE ISSUED A MEMO SUGGESTING THAT ALL PLTS PROGRAMMING THE FMS'S XCHK EACH FIX AGAINST THE CLRNC AS WELL AS AGAINST EACH FMS. ALSO; BOTH PLTS MUST BE PRESENT WHEN THE FMS'S ARE LOADED OR AT LEAST CONFIRM EACH FIX ENTERED INTO EACH FMS. IN THE CURRENT ENVIRONMENT OF AUTOMATION; I THINK MISTAKES LIKE THIS ARE MORE LIKELY TO HAPPEN. I HOPE BY REVEALING SUCH INCIDENTS TO NASA; FURTHER OCCURRENCES CAN AND WILL BE PREVENTED.

Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.