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A B737-800 flight crew; being given vectors and spacing altitude and airspeed clearances with respect to a B757 ahead of them; failed to insure VNAV mode was active after being cleared to maintain 3;000 until hinku; cleared for the localizer DME runway 26R approach to mia. As a result they continued in an unspecified MCP descent mode to 2;600 prior to hinku. A contributing factor was the setting of the MDA in the MCP altitude window prior to insuring VNAV was active.
| Attributes | |
| ACN | 1161431 |
| Time | |
| Date | 201403 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | MIA.Airport |
| State Reference | FL |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | FMS/FMC |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Events | |
| Anomaly | Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Overshoot Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT |
Narrative:
We were vectored off of hiley 4 arrival for the localizer/DME 26R mia. We had received numerous speed and altitude changes for B757 wake separation. [First we were] cleared to 4;000; slowed to 180 KTS. Next clearance was to cross hinku at 3;000; cleared for localizer/DME 26R. After setting minimums in the MCP altitude window and engaging LNAV/VNAV and [being] simultaneously slowed to 160 KTS for wake separation I; as pilot not flying; and the captain; as pilot flying; went heads up visual on the B757 and the airport and did not verify that VNAV path ever captured resulting in a low altitude crossing at hinku. The aircraft had remained in an MCP descent mode. We caught it at 2600 MSL and the captain corrected.
Original NASA ASRS Text
Title: A B737-800 flight crew; being given vectors and spacing altitude and airspeed clearances with respect to a B757 ahead of them; failed to insure VNAV mode was active after being cleared to maintain 3;000 until HINKU; cleared for the LOC DME Runway 26R approach to MIA. As a result they continued in an unspecified MCP descent mode to 2;600 prior to HINKU. A contributing factor was the setting of the MDA in the MCP altitude window prior to insuring VNAV was active.
Narrative: We were vectored off of HILEY 4 Arrival for the LOC/DME 26R MIA. We had received numerous speed and altitude changes for B757 wake separation. [First we were] cleared to 4;000; slowed to 180 KTS. Next clearance was to cross HINKU at 3;000; cleared for LOC/DME 26R. After setting minimums in the MCP Altitude window and engaging LNAV/VNAV and [being] simultaneously slowed to 160 KTS for wake separation I; as pilot not flying; and the Captain; as pilot flying; went heads up visual on the B757 and the airport and did not verify that VNAV PATH ever captured resulting in a low altitude crossing at HINKU. The aircraft had remained in an MCP descent mode. We caught it at 2600 MSL and the Captain corrected.
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.