The appellant, an aircraft maintenance company, negligently lost parts of an aircraft left in its possession for repair and storage.
The appellant claimed a lien for its unpaid repair and storage charges.
The respondent bank, which held a security interest in the aircraft, took possession and received insurance proceeds for the lost parts.
The appellant argued that the bank could not set off the cost of the lost parts against the lien claim because of an alleged agreement that the aircraft owner would insure against loss, and to prevent double recovery.
The Court of Appeal dismissed the appeal, holding that the insurance was not obtained to protect the appellant from its own negligence, and applying the principle that a wrongdoer cannot benefit from an innocent party's insurance.
The bank was entitled to equitable set-off.