WEST POINT, N.Y. (AP) _ Halfback Chad Davis scored on a 40-yard reverse and caught Army's first touchdown pass of the season as the Cadets got 31 points in the second quarter Saturday and beat mistake-prone Eastern Michigan 57-17.

The Eagles (1-8), who entered with the worst turnover margin in the nation, gave the game to Army (3-4) in the closing minutes of the first half, when the Cadets turned three interceptions into three touchdowns.

Leading 5-3, Army began the surge with 8:05 remaining when Davis caught a 37-yard scoring pass from Rick Roper. On Eastern Michigan's next play, Army linebacker Kevin Czarnecki intercepted John Hignite's pass at the Army 47 and Davis scored three plays later on a reverse around the right side to put the Cadets up 19-3.

Craig Thompson gave the Eagles their lone bright spot when he returned the ensuing kickoff 98 yards for a touchdown. EMU botched the snap on the extra- point attempt, but that mistake paid off when kicker Brad Horton hit Barry Stokes in the end zone for two points to cut the Army lead to 19-11 with 6:30 left.

Patmon Malcom hit a 37-yard field goal on Army's next possession and then the game fell apart for the Eagles.

The Eagles drove to the Army 46, where they faced a fourth-and-4. After a timeout, Hignite attempted a shovel pass over the middle but linebacker Pat Zelley intercepted it at the EMU 49 and raced untouched into the end zone to give Army a 29-11 lead with 2:26 left.

On EMU's next possession, Mike McElrath intercepted a Hignite pass at the EMU 39, and Roper took over. The Army quarterback gained 42 yards on five carries and hit split end Paul Andrzejewski for a 13-yard gain as the Cadets drove to the 2.

Roper, who rushed for 120 yards on 16 carries before departing in the third quarter, then hit tight end Bill Currence with a 2-yard TD pass with 22 seconds left for a 36-11 lead at intermission.

Fullback Steve Weber, who rushed for a career-high 121 yards, scored the only touchdown of the third quarter on a 6-yard run and Joe Ross's 4-yard run five seconds into the fourth quarter put Army up 50-11.

Kwesi Ramsey hit Cameron Moss with a 24-yard TD pass for EMU with 7:28 left.

Tom Napier scored on a 2-yard run for Army with eight seconds left in the game to complete the scoring.

The Army defense set the tone of the game early in the second quarter, stopping the Eagles on three plays from the Army 2 and forcing them to settle for Jim Langeloh's 21-yard field goal. Army's safety came when Matt Gillette snapped the ball through his own end zone on a punt attempt on the Eagles' second possession of the game.