Naomi Campbell Works in Soup Kitchen

By Caris Davis and Pete Norman

09/10/2008 at 09:15 AM EDT

Naomi Campbell began her latest round of community service this week.

The supermodel – who was sentenced to 200 hours of helping the homeless following her air rage assault at London's Heathrow Airport earlier this year – was put to work doing paperwork at the Whitechapel Mission drop-in center.

"Naomi is really eager to do the work that is required of her and give something back to the community," says a friend.

The 38-year-old worked all day Tuesday, taking a brief lunch break for a cereal bar and a banana. But others on her punishment detail complained that the temper-prone model wasn't asked to wash dishes or work janitorial detail.

"It's usually pretty greulling work, but not for her," one source told the U.K.'s Daily Mirror, adding that Campbell was treated "like a princess."

For her part, Campbell said she is just happy to being putting the April airport incident behind her. "I just want to keep my head down and get on with it," she told the Mirror.