LAX84FA087

The plt had departed mazatlan, Mexico at 0632 PST & had landed at los mochis & mexicali, Mexico & at calexico, CA, where he cleared U.S. Customs. Before departing calexico, he telephoned his family & told them the wx had been poor all day. The estimated time of arrival at yuma, AZ was 1730 PST. When the acft dd not arrive, a search was begun. The wreckage was found about 17 mi east of imperial, CA, where the plane had crashed on a westerly heading. At the time of impact, the acft was estimated to have been in a 15 deg descent & in a 65 deg right bank. No preimpact part failure or malfunction was found. Witnesses attested to worsening wx & gusty winds in the vicinity at the presumed time of the crash. The co-owner noted there was a 600 ft error in the altimeter, which the plt would compensate for, by adjusting the barometer setting.