 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
PIC of an A320 fails to program his FMS properly and the aircraft bypasses the 'cleared direct to' waypoint. ZLA controller questions routing.
| Attributes | |
| ACN | 381600 |
| Time | |
| Date | 199709 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : lax |
| State Reference | CA |
| Altitude | msl bound lower : 37000 msl bound upper : 37000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 200 flight time total : 10000 flight time type : 300 |
| ASRS Report | 381600 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | non adherence : published procedure non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On the offshore 3 departure out of sfo around cyprs intersection, ATC cleared us direct lax. The autoflt system was engaged and I selected direct on the mcdu and line selected 'lax.' the aircraft turned to an appropriate heading and we confirmed. Abeam lax, center asked if we were direct jli, and I looked at the mcdu and the navigation display and saw that we were indeed going direct to jli. We were showing 12 DME from lax. (Jli was our next waypoint after lax.) I do not know how jli got to be the 'to' waypoint but I have 3 possibilities: 1) I selected jli rather than lax, 2) we passed over a waypoint when I pushed the line select for lax, the waypoint scrolled, and jli was selected, or 3) we crossed our lax waypoint as ATC asked, so jli would be the next waypoint. I think scenario #2 to be the most likely. To prevent this, I recommend the procedure to be: 1) press direct, 2) type the identify in the scratch pad, and 3)ls 1L, the (direct to) prompt. Obviously I should have crosschecked the mcdu also to confirm the correct waypoint was active.
Original NASA ASRS Text
Title: PIC OF AN A320 FAILS TO PROGRAM HIS FMS PROPERLY AND THE ACFT BYPASSES THE 'CLRED DIRECT TO' WAYPOINT. ZLA CTLR QUESTIONS ROUTING.
Narrative: ON THE OFFSHORE 3 DEP OUT OF SFO AROUND CYPRS INTXN, ATC CLRED US DIRECT LAX. THE AUTOFLT SYS WAS ENGAGED AND I SELECTED DIRECT ON THE MCDU AND LINE SELECTED 'LAX.' THE ACFT TURNED TO AN APPROPRIATE HDG AND WE CONFIRMED. ABEAM LAX, CTR ASKED IF WE WERE DIRECT JLI, AND I LOOKED AT THE MCDU AND THE NAV DISPLAY AND SAW THAT WE WERE INDEED GOING DIRECT TO JLI. WE WERE SHOWING 12 DME FROM LAX. (JLI WAS OUR NEXT WAYPOINT AFTER LAX.) I DO NOT KNOW HOW JLI GOT TO BE THE 'TO' WAYPOINT BUT I HAVE 3 POSSIBILITIES: 1) I SELECTED JLI RATHER THAN LAX, 2) WE PASSED OVER A WAYPOINT WHEN I PUSHED THE LINE SELECT FOR LAX, THE WAYPOINT SCROLLED, AND JLI WAS SELECTED, OR 3) WE CROSSED OUR LAX WAYPOINT AS ATC ASKED, SO JLI WOULD BE THE NEXT WAYPOINT. I THINK SCENARIO #2 TO BE THE MOST LIKELY. TO PREVENT THIS, I RECOMMEND THE PROC TO BE: 1) PRESS DIRECT, 2) TYPE THE IDENT IN THE SCRATCH PAD, AND 3)LS 1L, THE (DIRECT TO) PROMPT. OBVIOUSLY I SHOULD HAVE XCHKED THE MCDU ALSO TO CONFIRM THE CORRECT WAYPOINT WAS ACTIVE.
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.