# Incident 20160221001749I: Bombardier Inc DHC-8-202, Dulles, VA, February 21, 2016

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: February 21, 2016, 13:20 local time
- Place: Dulles, VA
- Airport: Washington Dulles
- Damage: No damage
- Phase of flight: Takeoff: Rotation
- Operating rules: Air carrier (Part 121)
- Operator: JJBA
- Location: 38.9445° N, 77.4558° W: Placed by OpenAirDocs at Washington Dulles International Airport (IAD), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.9445&lon=-77.4558&mi=10
- Aircraft: N367PH, registered now (https://openairdocs.org/aircraft/N367PH) (OpenAirDocs)
- Registry model: Bombardier DHC-8-202 (registry code 1390007, https://openairdocs.org/model/bombardier-dhc-8-202) (OpenAirDocs)
- Registry engine: Pratt & Whitney Canada PW123 (registry code 52129, https://openairdocs.org/engine/pratt-whitney-canada-pw123) (OpenAirDocs)
- Reported make and model: BOMBARDIER INC DHC-8-202
- Reported engine: P&W CANADA PW123D
- People aboard: 31
- Fatal injuries: 0
- Other injuries: 0
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20160221001749I

## Narrative

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

ON 02/21/2016, AT APPROXIMATELY 13:20 EST, A COMMUTAIR DHC-8-202 AIRCRAFT FLYING AS UNITED EXPRESS FLIGHT 4944 EXPERIENCED A LEFT ENGINE FAILURE AND ASSOCIATED AUTOFEATHER OF THE LEFT PROPELLER UPON TAKE-OFF ROTATION AND INITIAL CLIMB-OUT.  THIS EVENT HAD BEEN IDENTIFIED AS A REPEAT OF A SIMILAR INCIDENT ON THIS SAME AIRCRAFT FROM 11 DAYS PRIOR. (SEE INCIDENT AEA0116009)

UPON INVESTIGATION BY THE COMPANY, AND DETAILED TROUBLESHOOTING OF THE LEFT ENGINE AUTOFEATHER SYSTEM, IT WAS DISCOVERED THAT THE #1 TORQUE SIGNAL CONDITIONING UNIT(TSCU) IS THE PROBABLE FAILING COMPONENT FOR THIS DISCREPANCY, AND THAT THE PRIOR REPLACEMENT OF THE #2 TSCU ON 2/10/2016 MAY HAVE BEEN INAPPROPRIATE CONSIDERING THE SYSTEM OPERATION PER AIRCRAFT MAINTENANCE MANUAL REFERENCE 61-21-00.  BASED ON THIS INFORMATION, THE COMPANY REMOVED THE #1 TSCU AND SHIPPED THE UNIT TO PRATT & WHITNEY FOR TEARDOWN AND EVALUATION.  THE RESULTS OF THIS EVALUATION IS NOT YET KNOWN AS OF 3/8/2016.

THE COMPANY DIRECTOR OF MAINTENANCE HAS NOTIFIED THE CERTIFICATE MANAGEMENT OFFICE ON 3/18/2016 THAT PRATT WHITNEY MAINTENANCE FACILITY AMO020-00 HAS VERIFIED INTERMITTENT FAULTS WITH THE SUSPECT TSCU SN: MM0152 AT INITIAL BENCH TESTING THAT MIGHT COINCIDE WITH THE IDENTIFIED FAULT, AND FURTHER TEARDOWN AND EVALUATION WILL COMMENCE.

## Other reports on N367PH (3)

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

- [Incident 20160210001739I](https://openairdocs.org/incident/20160210001739I), Feb 10, 2016: Bombardier Inc DHC-8-202 (N367PH), Latham, NY, No damage. On 2/10/2016, at approximately 0855 EST, a commutair DHC-8-202 aircraft while flying as united express flight 4775, on departure from Albany international(alb)…
- [Incident 20021119033789I](https://openairdocs.org/incident/20021119033789I), Nov 19, 2002: Dhav DHC8202 (N367PH), Portland, OR. (-23) Horizon air flight 2056 rdm to sea diverted to Portland or. When they experienced smoke in cabin and cockpit. Maintenance at Portland or. Ran both…
- [Incident 20020107002819I](https://openairdocs.org/incident/20020107002819I), Jan 7, 2002: Dhav DHC8202 (N367PH), Seattle, WA. (-23) On flight 2331 from lewiston Idaho to Seattle Washington crew noted noise and vibration on approach to seatac. On postflight inspection crew noted that…

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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