As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6398 - BOS-PWM - DURING CLIMB, A/C MADE AN UNSHEDULED LANDING DUE TO COMPASS NR 1 AND NR 2 SWITCH BROKE. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED SWITCH, OPS CHECK OK. AIRCRAFT WAS RELEASED AND RETURNED TO SERVICE. (M)