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B737-800 captain reported going around after an autopilot anomaly resulted in an unstable hand-flown instrument approach.
| Attributes | |
| ACN | 1353015 |
| Time | |
| Date | 201605 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | DCA.Airport |
| State Reference | DC |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Autopilot |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Altitude Overshoot Deviation - Procedural Clearance Inflight Event / Encounter Weather / Turbulence Inflight Event / Encounter Unstabilized Approach |
Narrative:
On approach vectors; autopilot was not capturing the localizer; so I; PF; clicked off the autopilot. As soon as I did; I lost my flight director. I was immediately faced with a raw data; in the weather; hand flown; instrument approach. The approach was not stable so we executed a go-around. During the miss; still hand flown; assigned 2500 ft; I climbed to 2900 ft. The controller didn't say anything so I don't think there was a conflict. The second approach was similar to the first. The third approach resulted in a successful approach and landing.I really had my hands full of airplane and the normal automation was unavailable. Attempts to reestablish the autopilot were unsuccessful until being vectored for the third approach. More aggressive attention to the altitude. Maybe let my copilot fly while I tried to troubleshoot.
Original NASA ASRS Text
Title: B737-800 Captain reported going around after an autopilot anomaly resulted in an unstable hand-flown instrument approach.
Narrative: On approach vectors; autopilot was not capturing the LOC; so I; PF; clicked off the autopilot. As soon as I did; I lost my flight director. I was immediately faced with a raw data; in the weather; hand flown; instrument approach. The approach was not stable so we executed a go-around. During the miss; still hand flown; assigned 2500 ft; I climbed to 2900 ft. The controller didn't say anything so I don't think there was a conflict. The second approach was similar to the first. The third approach resulted in a successful approach and landing.I really had my hands full of airplane and the normal automation was unavailable. Attempts to reestablish the autopilot were unsuccessful until being vectored for the third approach. More aggressive attention to the altitude. Maybe let my copilot fly while I tried to troubleshoot.
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.