Thomas & 1 Ors v Foreshore Marine Exhaust Systems Pty Limited & 1 Ors

The claimants, Mr Thomas and Mr Watt, jointly owned a boat that sank after one of its newly installed mufflers failed. They brought proceedings against the manufacturer of the mufflers, Foreshore Marine Exhaust Systems Pty Limited (FM), and the installer, Mr Turner. The claimants alleged negligence and, in the alternative, breaches of consumer protection provisions under sections 74B and 74D of the Trade Practices Act 1974 (Cth). Mr Turner was later discontinued from the proceedings, leaving FM as the sole respondent. The parties agreed on the amount of the claimants' loss, but the precise cause of the muffler's failure was disputed.

The central legal issues before the court were whether the mufflers were not reasonably fit for their purpose and not of merchantable quality, as required by sections 74B and 74D of the Trade Practices Act, and whether FM was negligent in their manufacture. The court was also required to consider whether uncertainty regarding the exact mechanism of failure precluded recovery, and to apply the appropriate standard of proof.

The court reasoned that the fitness for purpose of the mufflers should be assessed against what was objectively reasonable to expect in all the circumstances. It found that the polymer bond used in the muffler's construction was inadequate, leading to leakage and eventual failure. This inadequacy meant the mufflers were neither reasonably fit for their known purpose nor of merchantable quality. The court also found that negligence was established, particularly as the only two possible explanations for the failure were consistent with negligence. The court concluded that the claimants succeeded on appeal, setting aside the original judgment and ordering judgment to be entered for the claimants against FM for the agreed loss, with FM to pay the claimants' costs.