2022-10 · NASA ASRS report 1940176
B767 flight crew reported fluid leaking over wing; resulted in divert.
Just prior to entering ZZZ B; a flight attendant informed the flight deck crew that a passenger reported fluid leaking from the left wing. Captain requested I go back and inspect. Upon inspection I discovered fluid leaking from what appeared to be the left overwing fuel cap. The Captain then proceeded back to confirm my suspicions; he came to the same conclusion. After the captain sent pictures to [maintenance control] and discussed with both Dispatch and [maintenance control]; a joint decision was made to divert to ZZZZ. We declared [priority]; obtained a verbal clearance with ZZZ1 to divert off ZZZ B and proceed toward ZZZZ. We stated our intentions over the air-to-air frequency and diverted to ZZZZ. We performed all appropriate checklists and utilized all known diversion tools. We landed uneventfully in ZZZZ and were inspected by emergency vehicles prior to proceeding to the gate. After discussion with contract maintenance and the station manager; the decision was made to cancel due to lack of parts and need for further inspection.
Approaching the oceanic entry point ZZZZZ; at FL350 the aft flight attendant called me. He reported that a passenger showed him fluid streaming off the left wing. No fuel or hydraulic abnormalities were indicated on the flight deck and so I sent my First Officer back to look. He verified the streaming liquid and I went back to see if I could verify the source. I called dispatch on satcom to patch to Maintenance Control. They asked me to take a picture of the wing and email it to them and I complied. It was determined that it was fuel leaking from the over wing filler cap and collectively determined unsafe to continue our Atlantic crossing. I declared priority with ZZZ radio and received clearance to ZZZZ. I gave a briefing to the purser and made a PA announcement to the passengers. I made the determination to land overweight versus hold and burn off fuel in the interest of safety. I made an uneventful smooth landing overweight with aircraft rescue and fire fighting equipment (ARFF) standing by. A full stop was made on the runway for ARFF to view the aircraft. No visible fuel was observed; brake temperatures were normal and I taxied to the hard stand.
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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.
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