SMOH 1630.5 Lyco-320 E2D S/N L-34839-27A. Performed 100 hour inspection on engine. Compression 1 thru 4 are 70, 76, 74 & 74, 80 base pressure. Changed oil & oil filter. 7 qts Aeroshell 100 plus & AA 48110-2 filter. Replaced all intake pipe flange gaskets P/N 71973. All spark plugs inspected & serviced, reinstall & torq 360 in/lbs. Work performed I.A.W. Cessna 172 100 hour inspection checklist & Lyc direct drive overhaul maint. man/I.P.C. I certify that this engine was inspected in accordance with 100 hour inspection & was determined to be in airworthy condition at this time. Return to service.