Incident at EDMONTON INTL AB (CYEG)

Summary

2005-02-10: UPDATE TSB reported that the Air Canada Jazz DHC-8-300, C-GVTA, was en route from Calgary Intl (CYYC) to Ft McMurray, AB (CYMM), as JZA 8373. A number of electrical anomalies occurred, including illumination of the left elevator horn de-ice caution light, and the No. 1 intake heater light. The left transformer rectifier unit (TRU) circuit breaker tripped, and there was no voltage output from the No. 1 AC Gen A phase. Due to weather in the Calgary area, the crew elected to divert the flight to Edmonton Intl (CYEG), where it landed without further incident at 0743 MST. Maintenance determined that a No. 1 propellor-heat brush block had shorted, and was burned. The TRU AC neutral ground wire was burned, and three AC current limiters had blown. The events in this occurrence were consistent with those outlined in Bombardier ISAR 2004-07-2430, published July 13, 2004. Contamination from deicing fluid, engine oil and carbon dust can result in shorting of the propellor-heat brush blocks, and subsequent opening of AC current limiters. Loss of one phase to the TRU can result in excessive current flow through the neutral wire, and overheating of the wire.
2005-02-04: JZA 8373, a DHC-8-300, was en route from Calgary to Fort McMurray when the crew advised Edmonton ACC that they were having icing problems and were diverting to Edmonton. The flight was vectored to Runway 02 and landed safely at 1443Z. No other flights were inconvenienced. TSB will contact the company.

Details


CADORS Number 2005C0271
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2005-02-04 - 14:25
Day or Night?
Fatalities 0
Injuries
Aerodrome ID CYEG
Aerodrome Name EDMONTON INTL AB (CYEG)
Geographic Location Alberta, Canada, North America, Prairie and Northern Region, Vicinity Edmonton
TSB Occurrence Number A05W0026
TSB Class of Investigation Class 5
AOR Number 53345-V1
Reported By NAV CANADA
Categories System/component failure or malfunction [non-powerplant],Other,Icing
Events



Aircraft Details (1 aircraft)

Type Aeroplane
 Silhouette image of Aeroplane
Canadian Registration GVTA | Flightaware (Registration) | Flightaware (Tracking) | AvHerald
Foreign Registration
Country of Registration Canada
Occurrence Type Incident
Owner JAZZ AIR LIMITED PARTNERSHIP
Operator JAZZ AIR INC. (5002) Commercial
Make DEHAVILLAND - CAN
Model DHC 8 301
Year Built 1989
Engine Type Turbo prop
Engine Make PRATT & WHITNEY-CAN
Engine Model  Silhouette image of PW123
PW123
Gear Type Land
Private No
Amateur Built No
Flight Number JZA 8373
Flight Rule
CARS Subpart
Phase of Flight Cruise
Damage No Damage
Fatalities 0
Injuries 0
Events Electrical problem,Diversion,Weather - icing

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