# Incident 20180429004309I: Bombardier Inc CL-600-2B19, Ind, IN, April 29, 2018

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: April 29, 2018, 08:58 local time
- Place: Ind, IN
- Airport: Indianapolis
- Damage: No damage
- Phase of flight: Cruise/Level Flight
- Operating rules: Air carrier (Part 121)
- Operator: A6WA
- Aircraft: N467AW, registered now (https://openairdocs.org/aircraft/N467AW) (OpenAirDocs)
- Registry model: Bombardier CL-600-2B19 (registry code 1390008, https://openairdocs.org/model/bombardier-cl-600-2b19) (OpenAirDocs)
- Reported make and model: BOMBARDIER INC CL-600-2B19
- People aboard: 34
- Fatal injuries: 0
- Other injuries: 0
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20180429004309I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

ON SUNDAY APRIL 29TH 2018, AT APPROXIMATELY 0900 EST, AN AIR WISCONSIN  CL600-2B19, N467AW OPERATING AS UNITED EXPRESS FLIGHT NUMBER UA3890 DEPARTING FROM KDAY (DAYTON INTERNATIONAL AIRPORT) TO KORD ( CHICAGO O?HARE INTERNATIONAL AIRPORT) DIVERTED TO KIND (INDIANAPOLIS INTERNATIONAL AIRPORT) DUE TO A FLIGHT CONTROL ANOMALY.

ACCORDING TO A NARRATIVE REPORT FROM THE PIC, THE AIRCRAFT INITIALLY EXPERIENCED UNCOMMANDED YAW WHICH RESULTED IN AN AUTO PILOT DISCONNECT. THE FLIGHT CREW ACCOMPLISHED QRH PROCEDURES AND DISENGAGED THE YAW DAMPER SYSTEM. THE AIRCRAFT CONTINUED TO EXPERIENCE MILD TO VIOLENT YAW MOVEMENTS UNTIL LANDING. A REVIEW OF SIMILLAR EVENT FROM THE OPERATOR REVEALS THAT THE AIRCRAFT HAS A PROPENSITY TO DUTCH ROLL UPON LOOSING THE YAW DAMPER SYSTEM.  NO ACTION REQUIRED ON AIRMEN.

REVIEWED MAINTENANCE ACTION.THE FOLLOWING ITEMS WERE REMOVED AND REPLACED; THE INTEGRATED AVIONICS PROCESSING SYSTEMS (IAPS) CAGE ASSEMBLY, IAPS IOC2B CARD, FLIGHT CONTROL COMPUTER (FCC) 2, FLIGHT CONTROL PANEL (FCP) AND THE YAW DAMPER 1 & 2.

AFTER REMOVAL AND REPLACEMENT OF THE LISTED COMPONENTS, A SPIN TEST OF THE AILERON AUTO PILOT SERVO FAILED. THE AIRCRAFT WAS DEEMED NON RVSM AND THE AFFECTED SYSTEM PLACED ON MEL. THE AIRCRAFT WAS RELEASED AIRWORTHY TO CONTINUE SERVICE.

## Other reports on N467AW (2)

Matched to the same aircraft by N-number and date.

- [Incident 20200901013169I](https://openairdocs.org/incident/20200901013169I), Sep 1, 2020: Bombardier Inc CL-600-2B19 (N467AW), Chicago, IL, Minor damage. UA4868, a CRJ-200 operated by air Wisconsin airlines struck a gate tractor while taxiing into gate F17 at ord. The aircraft sustained minor damage to the right…
- [Incident 20111115026179I](https://openairdocs.org/incident/20111115026179I), Nov 15, 2011: Bombardier Inc CL-600-2B19 (N467AW), Richmond, VA, No damage. On 11/15/2011 flight 3617 departed phl at 11:40 EST and arrived at ric at 12:44. The pilot reported that he started his APU in the air with the packs on engine…

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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