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A B737-300 crew reported autoflight system anomalies. On a third approach attempt; they descended the aircraft low on approach and activated the GPWS forcing another go around. After three approaches they diverted to the filed alternate.
| Attributes | |
| ACN | 975138 |
| Time | |
| Date | 201109 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach Initial Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Autoflight System |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 194 Flight Crew Type 9000 |
| Person 2 | |
| Function | Pilot Flying First Officer |
| Experience | Flight Crew Last 90 Days 192 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Altitude Overshoot Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT |
Narrative:
On approach to runway xx; we had numerous instrument conflicts and a missed approach was accomplished. This instrument problem showed up again on the second approach attempt and the second missed approach. A new approach to a localizer was only considered as the weather was improving. The aircraft was descended to approximately 600 ft MSL prior to the 720 ft restriction at the final approach fix. A terrain caution was received and a missed approach was executed. Aircraft diverted to the alternate. I should have taken extra time to brief the approach properly by diverting my attention to the approach and only the approach.
Original NASA ASRS Text
Title: A B737-300 crew reported autoflight system anomalies. On a third approach attempt; they descended the aircraft low on approach and activated the GPWS forcing another go around. After three approaches they diverted to the filed alternate.
Narrative: On approach to Runway XX; we had numerous instrument conflicts and a missed approach was accomplished. This instrument problem showed up again on the second approach attempt and the second missed approach. A new approach to a LOC was only considered as the weather was improving. The aircraft was descended to approximately 600 FT MSL prior to the 720 FT restriction at the final approach fix. A Terrain Caution was received and a missed approach was executed. Aircraft diverted to the alternate. I should have taken extra time to brief the approach properly by diverting my attention to the approach and only the approach.
Data retrieved from NASA's ASRS site as of April 2012 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.