When you're discharged from the Army, the discharge reason is listed on your DD-214, Certificate of Release or Discharge From Active Duty. If Chapter 5-17 is listed, this means you were administratively discharged because of a physical or mental condition that impaired your ability to successfully perform your duties.
Types of Discharges
A discharge from the Army releases you from service and you have no further military obligations. There are five types of discharges: general under honorable conditions, honorable, under other than honorable conditions, dishonorable and bad conduct. Honorable, general under honorable conditions and under other than honorable conditions are administrative discharges. If you're released from service under Army Regulation Chapter 5-17 because of a physical or mental condition, you'll receive either an honorable or general administrative discharge.
Conditions That Impair Performance
Chapter 5-17 covers physical and mental conditions that don't rise to the level of medical disorders, but still impair a soldier's ability to effectively perform his duties, such as impaired emotion control, thinking and perception, as well as claustrophobia, chronic air or sea sickness, dyslexia and sleepwalking. Prior to receiving a 5-17 discharge, the Army provides you with counseling and rehabilitation in the hope of keeping you enlisted. If you've been in the service for at least six years, you're entitled to challenge the proposed discharge at a hearing before the Administrative Separation Board.