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B737 flight crew reported they failed to make a crossing restriction on arrival into oak after multiple wake turbulence encounters.
| Attributes | |
| ACN | 1502977 |
| Time | |
| Date | 201712 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | OAK.Airport |
| State Reference | CA |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737 Next Generation Undifferentiated |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Route In Use | STAR EMZOH |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | Initial Approach |
| Route In Use | STAR EMZOH |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Type 4800 |
| Person 2 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 260 |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Undershoot Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
We did not make the 7000 ft crossing restriction due to wake turbulence from preceding aircraft. We were on the VNAV path getting close to mynee but had to slow the descent because we got into preceding aircraft's wake turbulence for the third or fourth time on the STAR. The captain and I discussed getting out of the preceding aircraft's wake by asking norcal for the visual approach to 30 at oak. This would alleviate the wake turbulence issue. By the time we asked for the visual 30 and got cleared the visual; we did not make the mynee 7000 ft restriction which we didn't think was a big deal because we had just gotten cleared the visual. Somewhere around myshn approximately five miles past mynee; norcal advised us we didn't make the altitude restriction at mynee. We just agreed and moved on even though both of us were confused.
Original NASA ASRS Text
Title: B737 flight crew reported they failed to make a crossing restriction on arrival into OAK after multiple wake turbulence encounters.
Narrative: We did not make the 7000 ft crossing restriction due to wake turbulence from preceding aircraft. We were on the VNAV PATH getting close to MYNEE but had to slow the descent because we got into preceding aircraft's wake turbulence for the third or fourth time on the STAR. The Captain and I discussed getting out of the preceding aircraft's wake by asking NorCal for the visual approach to 30 at OAK. This would alleviate the wake turbulence issue. By the time we asked for the visual 30 and got cleared the visual; we did not make the MYNEE 7000 ft restriction which we didn't think was a big deal because we had just gotten cleared the visual. Somewhere around MYSHN approximately five miles past MYNEE; NorCal advised us we didn't make the altitude restriction at MYNEE. We just agreed and moved on even though both of us were confused.
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.