"When you reach your full retirement age, you can work and earn as much as you want and still receive your full Social Security benefit payment.."
You may find this link to be informative: http://www.socialsecurity.gov/pubs/10147.html
As you probably know, you have reached full retirement age at 66. Thus, you should have no penalty for outside work.
It has been my pleasure to assist you today with your information needs. If you have a follow-up question, please reply and ask it.