Incident at Baker Lake, NT (Aerodrome - power failure)

Summary

1999-10-22: The aircraft was enroute Baker Lake VFR from Rankin Inlet when the CARs operator advised that they had a total power failure, which caused the airport to lose the runway lights and radios. The North Bay RCO 126.7 was unserviceable as well. The CARs operator had spoken to the pilot of SGK 676 prior to the failure and advised the pilot to arrange for flare pots through the Airport Manager or the RCMP. Power was restored at 0950Z. North Bay FSS called SGK 676 on 126.7 and the pilot advised North Bay that they were returning to Rankin Inlet. Baker Lake was advised that SGK 676 was returning to Rankin Inlet. All NOTAMs were cancelled and no other delays were experienced. Aerodrome Safety will attempt to determine why the power failure occurred. OPI - Aerdrome Safety UPDATE Aerodrome Safety reported that the flight was conducted in order to transport NTPC employees to Baker Lake in response to a power failure which was affecting the entire community and the airport. Prior to departure, the pilot confirmed the airport lights were serviceable and operating on the emergency back-up power source. The lights remained operational until the flight was within 20 miles of the Baker Lake airport when they failed as well. The pilot was unable to locate the runway during 3 approach attempts and then elected to return to Rankin Inlet. The North Bay FSS advised the pilot when he was approximately 20 minutes out of Rankin Inlet that the lights at Baker Lake had been restored. The flight landed at Rankin Inlet, refueled and then successfully returned to Baker Lake. The power failure had occurred at approximately 2320 local time. At the time of the failure, indications are that the airport emergency power unit (EPU) and the VOR EPU both started properly and loads were transferred to the back-up supplies. Both of these back-up supplies failed at approximately 04:00 local time for unknown reasons. Airport maintenance staff were called in and manually re-started the airport EPU at 04:26 without any problems. They indicated that the fuel tank was about 1/2 full at the time. There were no faults annunciated on the control panel and no resets were required to re-start the unit. The unit was last tested for operation on September 21, 1999, and operated normally. Airport maintenance staff have tested it since it's failure, and have yet to induce a similar failure. The regional airport electrician will investigate further on his next trip in to Baker Lake.

Details


CADORS Number 1999C0872
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 1999-10-14 - 09:10
Day or Night?
Fatalities 0
Injuries
Aerodrome ID
Aerodrome Name
Geographic Location Nunavut, Canada, North America, Prairie and Northern Region, Baker Lake, NT
TSB Occurrence Number
TSB Class of Investigation
AOR Number
Reported By NAV CANADA
Categories Aerodrome
Events Aerodrome - power failure


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