At about 16:20 Hawaiian time, a Boeing 747-200F operated by Evergreen International Airlines experienced smoke in the cockpit while en route from Honolulu to Pago Pago. The flight was about 2 hours out of Honolulu at flight level 340, but returned for an uneventful landing. Inspection found an incandescent lamp dimmer was still hot after two hours without electrical power. Neither of the two circuit breakers attached to the dimmer assembly were open. When opened manually, both breakers were found to be red hot.
Jan. 5, Honolulu, Hawaii / Boeing 747
At about 16:20 Hawaiian time, a Boeing 747-200F operated by Evergreen International Airlines experienced smoke in the cockpit while en route from Honolulu to Pago Pago. The flight was about 2 hours out of Honolulu at flight level 340, but returned for an uneventful landing. Inspection found an incandescent lamp dimmer was still hot after two hours without electrical power. Neither of the two circuit breakers attached to the dimmer assembly were open. When opened manually, both breakers were found to be red hot....
Key Takeaways:
- A Boeing 747 cargo plane experienced smoke in the cockpit two hours into a flight from Honolulu, prompting its return for an uneventful landing.
- Investigation revealed an incandescent lamp dimmer remained hot despite being without electrical power for two hours, and its associated circuit breakers were red hot but untripped.
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