Incident Boeing 737-319 ZK-NGJ, Wednesday 12 September 2007
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Date:Wednesday 12 September 2007
Type:Silhouette image of generic B733 model; specific model in this crash may look slightly different    
Boeing 737-319
Owner/operator:Air New Zealand
Registration: ZK-NGJ
MSN: 25609/3130
Fatalities:Fatalities: 0 / Occupants: 101
Other fatalities:0
Aircraft damage: Unknown
Location:Auckland Airport, Auckland -   New Zealand
Phase: Take off
Nature:Passenger - Scheduled
Departure airport:Auckland International Airport (AKL/NZAA)
Destination airport:Christchurch
Investigating agency: TAIC
Confidence Rating: Accident investigation report completed and information captured
On Tuesday 12 September 2006 at 0727, flight NZ503, a Boeing 737-319 registered ZK-NGJ started its take-off at Auckland International Airport on a scheduled flight to Christchurch. On board were 2 pilots, 3 cabin crew and 96 passengers.

Partway through the take-off roll an electrical relay failed, causing a loss of battery bus power. The pilots identified an escalating number of electrical malfunctions after take-off and elected to return to Auckland. After landing, the aircraft started to slowly fill with smoke, so the captain ordered a ground evacuation of the aircraft. All passengers and crew exited the aircraft without injury.

The evidence available pointed to the failure of the relay being due to faulty manufacture, which led to the contacts within the relay deteriorating over its 7-year life to the stage they were unable to remain closed because of the vibration encountered during the take-off.

The operator had initiated actions to monitor the performance of the relay and establish more robust procedures for crews to identify and handle a loss of battery bus power.

The ground evacuation provided valuable guidance on the effectiveness of the operator?s crew resource management and emergency procedures training

Accident investigation:
Investigating agency: TAIC
Report number: 
Status: Investigation completed
Download report: Final report


Revision history:

03-Nov-2016 20:28 harro Updated [Total fatalities, Total occupants, Other fatalities, Phase, Nature, Departure airport, Destination airport, Source, Narrative]
17-Feb-2022 11:37 Ron Averes Updated [Location]
27-May-2023 02:14 Ron Averes Updated

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