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B737-700 flight crew reported they failed to make a crossing restriction when they missed a step in FMS setup.
| Attributes | |
| ACN | 1286027 |
| Time | |
| Date | 201508 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZNY.ARTCC |
| State Reference | NY |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Route In Use | STAR MILTON4 |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 174 |
| Person 2 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 251 |
| Events | |
| Anomaly | Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Undershoot Deviation - Procedural Clearance |
Narrative:
Approaching keating (etg) on the milton 4 arrival at FL390; we were instructed to descend to FL350 and cross etg at FL330 and to give them a good rate to FL350. I [verified] 350 in the altitude window and selected vertical speed and 2000 fpm descent. I then [verified] 330 into the FMC for keating. We leveled at 350 and I watched as the vertical rnp indicator approached the profile to start the descent to cross keating at FL330. As it approached profile I selected VNAV but failed to put 330 in the altitude window. When the aircraft didn't start down I immediately put 330 in the altitude window and selected vertical speed of 3000 fpm and speedbrakes but with only 2000 feet to lose we never caught up with the profile and crossed keating 500 feet high.better attention to details; however; when arrivals which are built into the FMC are altered by ATC which require intervention by the pilots; a systemic potential for error is introduce into the operation.
Original NASA ASRS Text
Title: B737-700 flight crew reported they failed to make a crossing restriction when they missed a step in FMS setup.
Narrative: Approaching Keating (ETG) on the MILTON 4 Arrival at FL390; we were instructed to descend to FL350 and cross ETG at FL330 and to give them a good rate to FL350. I [verified] 350 in the Altitude window and selected Vertical Speed and 2000 fpm descent. I then [verified] 330 into the FMC for Keating. We leveled at 350 and I watched as the vertical RNP indicator approached the profile to start the descent to cross Keating at FL330. As it approached profile I selected VNAV but failed to put 330 in the Altitude window. When the aircraft didn't start down I immediately put 330 in the Altitude window and selected Vertical Speed of 3000 fpm and speedbrakes but with only 2000 feet to lose we never caught up with the profile and crossed Keating 500 feet high.Better attention to details; however; when arrivals which are built into the FMC are altered by ATC which require intervention by the Pilots; a systemic potential for error is introduce into the operation.
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.