What was found
LEFT ISOLATION VALVE WOULD NOT EXTENGISH AFTER ENGINE START. REMOVED AND REPLACED RELAY K-16, NO HELP REMOVED AND PNEUMATIC CONTROL PANEL. OPS CHK GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
LEFT ISOLATION VALVE WOULD NOT EXTENGISH AFTER ENGINE START. REMOVED AND REPLACED RELAY K-16, NO HELP REMOVED AND PNEUMATIC CONTROL PANEL. OPS CHK GOOD.