The U.S. government Wednesday said it proposed nearly $350,000 in fines against Boeing Co. (BA), alleging the company improperly accepted, documented or installed certain parts on more than 100 commercial aircraft.

The Federal Aviation Administration alleged that the aerospace giant:

-Accepted vertical stabilizer, or tail fin, parts from a supplier that were missing a required compound for fighting corrosion. The government said these components were installed on 33 aircraft between 1997 and 2000.

-Failed to install main wheel well parts in 17 aircraft prior to April 1998. The FAA said documents indicated those components had been installed when they had not been.

-Improperly installed wiring bundles that chaffed against oxygen generators on four planes. The government said the problem was discovered in 1998.

-Installed unapproved and defective fuel pump components delivered to the company for 72 Boeing 747 series aircraft.

The FAA said Boeing had taken steps to identify and correct problems.

A Boeing spokesman would not comment on specific allegations but said the company had not concluded that the fines were warranted.

"We are pursuing the next step to mitigate these issues," company spokesman Tom Ryan said.

By law, companies are permitted to challenge a proposed fine in talks with the government. Aviation regulators have agreed to reduce penalties in some cases.