B767 flight crew reported a false cargo fire indication not referenced in QRH; resulted in expeditious handling to divert airport.
Synopsis
B767 flight crew reported a false cargo fire indication not referenced in QRH; resulted in expeditious handling to divert airport.
Narrative
Situation: CA (Captain) on rest cycle; FO (First Officer) was PF (Pilot Flying); RO (Relief Officer) was PM (Pilot Monitoring); cruise flight westbound.I (FO/PF) noticed that cargo fire light B6 and B8 were illuminated amber and immediately pointed this out to the RO. We scanned the instruments and found no other alerts related to fire or smoke and took note that the cargo compartment temperatures were low (between 5-15degC). We looked through the QRH and found no relevant procedure and concurrently alerted the CA. CA returned to his position in the left seat. At this point the CA contacted Company Maintenance via the SATCOM. A conversation with Maintenance determined no firm procedure to this situation and the call was patched through to Supervisor.At this point we had crossed ZZZ and I took over left HF to make the appropriate position report and did not fully hear the conversation with Supervisor. However it was briefed that the most conservative decision was plan a precautionary diversion; a decision which all members of the crew agreed.The situation was relayed via HF to ZZZZ Radio and [priority was received]. Given our position; direction of flight and weather provided by Dispatch; it was determined that diverting to ZZZZ1 was the best course of action. After establishing radar and VHF contact with ZZZZ; updated weather was relayed and we requested CFR (Crash Fire Rescue) be placed in standby.We determined that we would be landing overweight at ZZZZ1 and took steps to increase drag whilst maintaining best speed to reduce our weight. As we were descended and vectored towards ZZZZ1 we could see that we would still be approximately 6;000 lbs. overweight. We determined that it was better to continue with the landing rather than remain airborne with unknown conditions in the cargo bay.The aircraft was landed on Runway XX without incident and we taxied to a parking area with CFR in tow. The aircraft was shutdown and an initial assessment from CFR reported no damage or signs of fire or smoke.
Second reporter narrative
During that time FO (First Officer) was Pilot Flying; RO (Relief Officer) was Pilot Monitoring; FO was notice the Cargo Fire Panel B6 and B8 light was illuminate amber; FO and RO comply with QRH 8.2; didn't find related procedures; also there has no EICAS (Engine Indicating and Crew Alerting System) massage; then FO called Captain to get involved see the cargo light; Captain went to the cargo compartment to check and smoke or fire in the back of the plane; Captain also look at the cargo compartment temperature shows 11 and 9; right after Captain called the mechanics to get advise if they have any idea what is going on. After explaining to Maintenance there was no procedure that could be suggested. We then transferred the call to the Supervisor Name and three party of us were determined that a precautionary diversion was the appropriate course of action. Shortly after we talked to ZZZZ; we [received a priority] divert to our alternate airport ZZZZ1; We identified that it's overweight landing; we took all the steps and effort to minimize the overweight landing. Land overweight 6;000 pounds on the overweight landing. CFR (Crash Fire Rescue) was followed to identify any smokes or fire. When aircraft pulled in the ramp; CFR did all inspection to check that there is no indication fire and smokes in the lower cargo deck.
More incidents for this aircraft family →
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.