PanAm flight PA816 was a regular flight from Auckland (AKL) to Los Angeles (LAX) with an intermediate stop at Papeete, Tahiti (PPT).
Boeing 707 "Clipper Winged Racer" took off from runway 04 at Papeete-Faaa Airport for its second leg of the flight. The airplane climbed to a height of 300 feet and initiated a left turn. It began to descend with an excessive bank turn and struck the sea. The wreckage sank into the 700 m deep waters off Papeete. Both CVR and FDR were not recovered.

PROBABLE CAUSE: Unknown. It is considered possible that an instrument failure may have diverted the crew's attention during the turn. Since it was dark outside and the turn was made towards the sea. No visual references were available.

ASN Report were here:https://asn.flightsafety.org/wikibase/330135