Bristow lost a 212 in the Sumatran jungle when the T/R departed in the cruise with half of the 90 box. The T/R was not found within a few hundred yards of the crash site. It later found by some Indonesians who were paid a lot of rupiahs, the distance from the locus could not be determined. The rotor was examined by the AAIB and it was determined that it had been hit by an oil cooler duct. The aircraft had caught fire and the port side was burnt out but the starboard panel was still attached. It was assumed that a faulty catch on the panel had failed and the panel had flown over the tail boom and hit the rotor.