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Emb-175 captain reported they overshot a crossing restriction descending into pae; citing turbulence as a contributing factor.
| Attributes | |
| ACN | 1639165 |
| Time | |
| Date | 201904 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | SEA.Airport |
| State Reference | WA |
| Aircraft 1 | |
| Make Model Name | EMB ERJ 170/175 ER/LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Overshoot Deviation - Procedural Clearance Inflight Event / Encounter Weather / Turbulence |
Narrative:
About 200 miles to top of descent; [we] requested ATIS for both sea and pae by ACARS and radio. A south flow was confirmed for sea and north landing for pae. The FMS was then switched from the ILS 16R approach to the RNAV (GPS) runway 34L into pae. South flow altitudes and speeds were then verified on the olympia-2 against the FMS data; which all checked right and were briefed (olm 270 knots @ 17;000 feet and arvad 250 knots at 13;000 feet). Shortly after; we flew through an area of light-moderate turbulence which led us to request a lower altitude; [we were] then cleared via the olympia-2. 13;000 feet was set in the altitude alerter and a vs of 1500 FPM descent started until intercepting the descent path with pth indicated. As a result of the prevailing conditions; we crossed olm below 17;000 feet; then were queried by ATC. We stated our present position; altitude and condition; soon after; ATC cleared us to maintain 13;000 feet then 10;000 feet. We should have informed ATC earlier during the descent that we could not maintain 17;000 feet; instead of waiting for him to query us on it.
Original NASA ASRS Text
Title: EMB-175 Captain reported they overshot a crossing restriction descending into PAE; citing turbulence as a contributing factor.
Narrative: About 200 miles to Top of Descent; [we] requested ATIS for both SEA and PAE by ACARS and radio. A south flow was confirmed for SEA and north landing for PAE. The FMS was then switched from the ILS 16R approach to the RNAV (GPS) RWY 34L into PAE. South flow altitudes and speeds were then verified on the OLYMPIA-2 against the FMS data; which all checked right and were briefed (OLM 270 knots @ 17;000 feet and ARVAD 250 knots at 13;000 feet). Shortly after; we flew through an area of light-moderate turbulence which led us to request a lower altitude; [we were] then cleared via the OLYMPIA-2. 13;000 feet was set in the altitude alerter and a VS of 1500 FPM descent started until intercepting the descent path with PTH indicated. As a result of the prevailing conditions; we crossed OLM below 17;000 feet; then were queried by ATC. We stated our present position; altitude and condition; soon after; ATC cleared us to maintain 13;000 feet then 10;000 feet. We should have informed ATC earlier during the descent that we could not maintain 17;000 feet; instead of waiting for him to query us on it.
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.