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H25B flight crew receives late runway change on seavu STAR to lax. Reprogramming of FMS to comply results in altitude deviation over decor intersection.
| Attributes | |
| ACN | 708020 |
| Time | |
| Date | 200608 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | intersection : decor |
| State Reference | CA |
| Altitude | msl single value : 10400 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | general aviation : corporate |
| Make Model Name | BAe 125 Series 800 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other |
| Route In Use | arrival star : seavu |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 4500 flight time type : 500 |
| ASRS Report | 708020 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 8870 flight time type : 35 |
| ASRS Report | 708016 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : crossing restriction not met altitude deviation : undershoot non adherence : published procedure other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem flight crew : overrode automation flight crew : returned to intended or assigned course |
| Supplementary | |
| Problem Areas | Chart Or Publication Aircraft ATC Human Performance Flight Crew Human Performance |
| Primary Problem | Ambiguous |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Los angeles approach control assigned flight the seavu.one arrival to runway 25R. When flight was approaching cataw; crew received amended clearance: the seavu.one arrival to runway 24R. I was captain/PIC serving on this leg as the PNF. I am proficient with the collins pro-line navigation system in this aircraft. However; I was extremely rushed to get the altered approach loaded into the FMS. I overwrote the existing arrival using the new runway (which requires different intxns). The FMS seemed to accept what I had programmed. The autoplt indicated it was in vertical navigation mode and horizontal navigation mode. However; the turn toward final and toward decor intersection was overshot. The autoplt was disconnected. At this time; just outside decor; the crew first saw past the initial distraction of being off course to note the aircraft was above altitude assigned at decor; which is charted 'between 9800 and 9000 ft.' the aircraft passed over decor at 10400 ft. Factors affecting crew: too rushed; unfamiliar with lax and; therefore; unwilling to decline amended clearance. We ought to have asked to be 'turned out' to create time. Other factors: crew debriefing reveals we both feel the FMS malfunctioned. Specifically; indicating (autoplt and flight director) on course and descent path. CDU's showed proper intxns and altitudes; but onboard indications were erroneous.
Original NASA ASRS Text
Title: H25B FLT CREW RECEIVES LATE RWY CHANGE ON SEAVU STAR TO LAX. REPROGRAMMING OF FMS TO COMPLY RESULTS IN ALTDEV OVER DECOR INTXN.
Narrative: LOS ANGELES APCH CTL ASSIGNED FLT THE SEAVU.ONE ARR TO RWY 25R. WHEN FLT WAS APCHING CATAW; CREW RECEIVED AMENDED CLRNC: THE SEAVU.ONE ARR TO RWY 24R. I WAS CAPT/PIC SERVING ON THIS LEG AS THE PNF. I AM PROFICIENT WITH THE COLLINS PRO-LINE NAV SYS IN THIS ACFT. HOWEVER; I WAS EXTREMELY RUSHED TO GET THE ALTERED APCH LOADED INTO THE FMS. I OVERWROTE THE EXISTING ARR USING THE NEW RWY (WHICH REQUIRES DIFFERENT INTXNS). THE FMS SEEMED TO ACCEPT WHAT I HAD PROGRAMMED. THE AUTOPLT INDICATED IT WAS IN VERT NAV MODE AND HORIZ NAV MODE. HOWEVER; THE TURN TOWARD FINAL AND TOWARD DECOR INTXN WAS OVERSHOT. THE AUTOPLT WAS DISCONNECTED. AT THIS TIME; JUST OUTSIDE DECOR; THE CREW FIRST SAW PAST THE INITIAL DISTR OF BEING OFF COURSE TO NOTE THE ACFT WAS ABOVE ALT ASSIGNED AT DECOR; WHICH IS CHARTED 'BTWN 9800 AND 9000 FT.' THE ACFT PASSED OVER DECOR AT 10400 FT. FACTORS AFFECTING CREW: TOO RUSHED; UNFAMILIAR WITH LAX AND; THEREFORE; UNWILLING TO DECLINE AMENDED CLRNC. WE OUGHT TO HAVE ASKED TO BE 'TURNED OUT' TO CREATE TIME. OTHER FACTORS: CREW DEBRIEFING REVEALS WE BOTH FEEL THE FMS MALFUNCTIONED. SPECIFICALLY; INDICATING (AUTOPLT AND FLT DIRECTOR) ON COURSE AND DSCNT PATH. CDU'S SHOWED PROPER INTXNS AND ALTS; BUT ONBOARD INDICATIONS WERE ERRONEOUS.
Data retrieved from NASA's ASRS site as of January 2009 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.