Post accident investigation found improper maintenance to the left main gear was at fault.

A common problem in most companies is the improper maintenance of the FAR.

Despite malfunctions due to improper maintenance the plane itself was functional.

The rate of accidents related to improper maintenance or poor pilot training is down sharply.

The cause of the accident was determined to be improper maintenance.

Most of the problems, he said, involve improper maintenance and installation.

Another concern is the improper maintenance of oxygen equipment.

If a marker develops a leak from improper maintenance, it could cause a fire.

Some customers criticized the company for not moving sooner to fix the problem, which Toyota says stems from improper maintenance.

"Insurance companies don't pay claims resulting from improper maintenance," he explained.