FHA only becomes involved in inspections on 203K rehab loans.
On a regular FHA loan, an FHA approved appraiser will be sent to determine the value of the property. This appraiser has a checklist of items that must meet FHA guidelines in order for the loan to be approved. This is to protect the lender and necessary for FHA to insure the loan, and is done to protect them not you, the buyer. If the property does not meet the requirement, the appraiser will provide a list of items that need repair in order to gain loan approval.
FHA does not require a home inspection (aside from termite), but, as a buyer, you do not want to skip this important step. You, as a buyer, need a qualified inpsector to look out for your interests and provide you a detailed report on the condition of the property.
On rehab loans, FHA does have approved inspectors, but I assumed yours was not a rehab loan.