The reading light in a B777's lower level crew rest area emitted a puff of smoke which a Flight Attendant then shot with halon. No fire or smoke sensors were activated.
Synopsis
The reading light in a B777's lower level crew rest area emitted a puff of smoke which a Flight Attendant then shot with halon. No fire or smoke sensors were activated.
Narrative
[The] Flight Attendant in [the] lower lobe crew rest attempted to adjust reading light over her bunk during her break. [She] observed a 'puff' of smoke from bulb. She unilaterally elected to discharge a single shot of halon fire extinguisher on light fixture; then notified cockpit. [The] Captain advised her to turn off [the] light; [but] she said she was unable to do so. [There was] no more smoke. No alarm activated in lower lobe crew rest or cockpit. Purser was advised and she investigated and reported to cockpit that problem was resolved. Lower lobe crew rest lights [were] turned off with switch in aft galley. All flight attendant crew departed [the] lower lobe crew rest as [a] precaution due to halon discharge. Captain called Dispatch/Maintenance. Maintenance recommended removing bulb from fixture. [That was] accomplished [with] no problem. Maintenance entered [a] write-up regarding [the] reading light and also [the] discharge of halon extinguisher. Maintenance and Dispatch concurred with Captain that continuation to the planned destination was prudent. Flight attendants monitored [the] lower lobe crew rest periodically for remainder of flight [with] no problems reported. Contract mechanics [were] debriefed on arrival. [The] mechanics inspected; [but] found no problems. [They] felt [that the] small amount of smoke was probably caused by faulty bulb.
Second reporter narrative
The Captain advised me that a Flight Attendant witnessed a small 'puff' of smoke emitting from a light and there was no evidence of flame or additional smoke associated with it. The Flight Attendant then attempted to remove power from the light; and being unable to do so; she then made the decision to employ and discharge a quick shot of halon in the associated light socket. I had asked the Captain if any warnings; cautions; or smoke alarms were activated on the EICAS or the lower lobe crew rest facility. He stated that there were no indications of any sort. Additionally there was no evidence of smoke permeating into the cabin and none of the passengers in the area of the rest facility reported smoke to the flight attendants who were on duty.
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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.