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Crj-900 first officer reported miscommunication led to overshooting a crossing restriction while executing a 'descend via' clearance.
| Attributes | |
| ACN | 1597119 |
| Time | |
| Date | 201811 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | LGB.Airport |
| State Reference | CA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Regional Jet 900 (CRJ900) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Altitude Overshoot Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy |
Narrative:
After given the clearance to descend via the dsnee 4 RNAV arrival by la center; we complied and began the descent. Everything went uneventfully until we were switched to the next controller about the dsnee fix on the arrival. At that time; she gave us a clearance to descend via to 5;000 feet; which is not a published altitude on the arrival. I repeated back the clearance verbatim. The pilot flying and I were a little confused with the clearance. I asked the pilot flying 'would you like me to clarify' [and] he said yes'. I then asked ATC for a clarification; she gave me the same clearance. I then told the pilot flying we are good to go to 5;000 feet. The pilot flying continued the descent to 6;800 feet [which is] below the published altitude on the mckye fix. He then stopped his descent and asked me to clarify the clearance again. I asked ATC if she wanted us to comply with all the altitudes restrictions on the arrival; [to] which she replied yes to all restrictions. We then stayed at 6;800 feet [and] proceeded to the next fix and altitude and then to our destination. I believe the root cause of this event is a communication error between the flight crew. I believe we as a flight crew should have cleared up the misunderstanding of the clearance together and come to agreement; before we asked ATC the clarify the clearance.
Original NASA ASRS Text
Title: CRJ-900 First Officer reported miscommunication led to overshooting a crossing restriction while executing a 'descend via' clearance.
Narrative: After given the clearance to descend via the DSNEE 4 RNAV arrival by LA Center; we complied and began the descent. Everything went uneventfully until we were switched to the next controller about the DSNEE fix on the arrival. At that time; she gave us a clearance to descend via to 5;000 feet; which is not a published altitude on the arrival. I repeated back the clearance verbatim. The Pilot Flying and I were a little confused with the clearance. I asked the Pilot Flying 'would you like me to clarify' [and] he said yes'. I then asked ATC for a clarification; she gave me the same clearance. I then told the Pilot Flying we are good to go to 5;000 feet. The Pilot Flying continued the descent to 6;800 feet [which is] below the published altitude on the MCKYE fix. He then stopped his descent and asked me to clarify the clearance again. I asked ATC if she wanted us to comply with all the altitudes restrictions on the arrival; [to] which she replied yes to all restrictions. We then stayed at 6;800 feet [and] proceeded to the next fix and altitude and then to our destination. I believe the root cause of this event is a communication error between the flight crew. I believe we as a flight crew should have cleared up the misunderstanding of the clearance together and come to agreement; before we asked ATC the clarify the clearance.
Data retrieved from NASA's ASRS site 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.