As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE VISIT: MAINTENANCE REPORTS #1 OB SLAT HAS BINDING & LOUD BANGING/POPPING SOUND DURING EXTENSION & RETRACTION BETWEEN 5-10 DEGREES TRAVEL. MAINTENANCE LUBED NO. 1 SLAT IAW AMM 12-22-71-604 AND 12-22-71-600. NO FURTHER NOISE FROM #1 SLAT NOTED.