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An A310C descends on an offset track (due to WX) in ZLC airspace and misses required crossing altitude by 4000 ft.
| Attributes | |
| ACN | 369290 |
| Time | |
| Date | 199705 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : bvl |
| State Reference | UT |
| Altitude | msl bound lower : 17000 msl bound upper : 21000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zlc tower : dfw |
| Operator | common carrier : air carrier |
| Make Model Name | A310 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | arrival star : star |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : atp pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 75 flight time total : 8500 flight time type : 50 |
| ASRS Report | 369290 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met non adherence : clearance non adherence : far |
| Independent Detector | other controllera |
| Resolutory Action | none taken : insufficient time |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Our flight was cleared bonneville 1 arrival, slc, cross knole intersection at 17000 ft. WX (thunderstorms) prevented us from going direct knole. Vector to parallel was required and granted to parallel our track. Subsequently given 250 KT speed restr. I discovered because of the speed restr, we would not make knole or abeam knole at 17000 ft. Could not get a hold of center due to radio traffic. Finally at approximately 5-10 NM abeam knole, center acknowledged with an 'ok, I see you 4000 ft high,' with no further instruction. Handed off to approach control. Factors: deviations due to WX (thunderstorms). Speed restrs with late descent clearance. High radio traffic, unable to contact center. Ambiguous response from ATC. High workload with FMS/FMC EFIS type aircraft.
Original NASA ASRS Text
Title: AN A310C DSNDS ON AN OFFSET TRACK (DUE TO WX) IN ZLC AIRSPACE AND MISSES REQUIRED XING ALT BY 4000 FT.
Narrative: OUR FLT WAS CLRED BONNEVILLE 1 ARR, SLC, CROSS KNOLE INTXN AT 17000 FT. WX (TSTMS) PREVENTED US FROM GOING DIRECT KNOLE. VECTOR TO PARALLEL WAS REQUIRED AND GRANTED TO PARALLEL OUR TRACK. SUBSEQUENTLY GIVEN 250 KT SPD RESTR. I DISCOVERED BECAUSE OF THE SPD RESTR, WE WOULD NOT MAKE KNOLE OR ABEAM KNOLE AT 17000 FT. COULD NOT GET A HOLD OF CTR DUE TO RADIO TFC. FINALLY AT APPROX 5-10 NM ABEAM KNOLE, CTR ACKNOWLEDGED WITH AN 'OK, I SEE YOU 4000 FT HIGH,' WITH NO FURTHER INSTRUCTION. HANDED OFF TO APCH CTL. FACTORS: DEVS DUE TO WX (TSTMS). SPD RESTRS WITH LATE DSCNT CLRNC. HIGH RADIO TFC, UNABLE TO CONTACT CTR. AMBIGUOUS RESPONSE FROM ATC. HIGH WORKLOAD WITH FMS/FMC EFIS TYPE ACFT.
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.