As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A FLIGHT WAS CANCELLED DUE TO THE CREW NOT BEING ABLE TO START THE NR 1 ENGINE. THE MAINTENANCE TEAM TROUBLESHOT, BUT WAS UNABLE TO DUPLICATE THE DISCREPANCY. AS A PRECAUTIONARY MEASURE THE STARTER DISENGAGE SWITCH WAS CLEANED. OPERATIONAL CHECKS WERE SATISFACTORY AND THE AIRCRAFT WAS RETURNED TO SERVICE.