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CL65 flight crew reports autopilot malfunction during coupled ILS approach below 300 feet AGL. Autopilot was disengaged and missed approach initiated; the second approach was uneventful with autopilot engaged.
| Attributes | |
| ACN | 835749 |
| Time | |
| Date | 200905 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Light | Dawn |
| Aircraft 1 | |
| Make Model Name | Regional Jet 200 ER/LR (CRJ200) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Autopilot |
| Person 1 | |
| Function | Pilot Not Flying First Officer |
| Experience | Flight Crew Last 90 Days 1600 Flight Crew Total 8800 Flight Crew Type 7000 |
| Person 2 | |
| Function | Captain Pilot Flying |
| Experience | Flight Crew Last 90 Days 150 Flight Crew Total 18000 Flight Crew Type 5000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
Established on the ILS CAT 1 approach RVR 2200 feet. Configured flaps 45 before landing check 2 miles from the outer marker. Over marker captain called the marker and altitude crossing and I responded altitude checks no flags as per our procedures. I called 500 above DH; at 400 above we both noticed a yellow a blink on the pfd. At 300 I called approach lights continue. At that time the localizer turned yellow and needle move slightly to the right. EICAS message autopilot pitch trim rwd appeared I and the captain called missed approach. He disconnected the autopilot executed the published missed approach and at that time while he turned the autopilot off the plane suddenly banked 30 degrees to the left. The shaker went off for a second since we were at 141 vref and in a bank. I advised ATC missed approach and the tower gave us heading 180 and maintain 3000. They asked for the missed approach reason and I told the tower equipment malfunction. I did all the climb; 10000; cruise check; reviewed the QRH for the autopilot trim rwd message; talked to flight attendants and passengers and we did the descent approach checks and ATC vectored us to an ILS to a normal approach and landing.
Original NASA ASRS Text
Title: CL65 flight crew reports autopilot malfunction during coupled ILS approach below 300 feet AGL. Autopilot was disengaged and missed approach initiated; the second approach was uneventful with autopilot engaged.
Narrative: Established on the ILS CAT 1 approach RVR 2200 feet. Configured Flaps 45 before landing check 2 miles from the outer marker. Over marker Captain called the marker and altitude crossing and I responded altitude checks no flags as per our procedures. I called 500 above DH; at 400 above we both noticed a yellow A blink on the PFD. At 300 I called approach lights continue. At that time the localizer turned yellow and needle move slightly to the right. EICAS message autopilot pitch trim RWD appeared I and the Captain called missed approach. He disconnected the autopilot executed the published missed approach and at that time while he turned the autopilot off the plane suddenly banked 30 degrees to the left. The shaker went off for a second since we were at 141 Vref and in a bank. I advised ATC missed approach and the tower gave us heading 180 and maintain 3000. They asked for the missed approach reason and I told the tower equipment malfunction. I did all the climb; 10000; cruise check; reviewed the QRH for the autopilot trim RWD message; talked to flight attendants and passengers and we did the descent approach checks and ATC vectored us to an ILS to a normal approach and landing.
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.