NEW YORK--(BUSINESS WIRE)--Fitch Ratings affirms the senior and subordinate notes issued by PHEAA Student Loan Trust I - 2003 Trust Indenture at 'AAAsf'. The Rating Outlook on all outstanding notes remains Stable. KEY RATING DRIVERS High Collateral Quality: The trust collateral consists of 100% of Federal Family Education Loan Program (FFELP) loans. The credit quality of the trust collateral is high, in Fitch's opinion, based on the guarantees provided by the transaction's eligible guarantors a