What was found
EXTERIOR SKIN HAS AREA OF PITTING BS. 360+5 STR.5L. GROUNDED - YES. REMOVED AND REINSTALLED CABIN SIDEWALLS AND #1, #2 STOWBINS L/H SIDE IAW B737-900 AMM 25-24-31-000-804-001, AMM 25-21-46, AMM 25-24-31. DISPLACED AND RESECURED INSULATION AT STR 5L STA 360-380 IAW B737-900 AMM 25-80-00. REMOVED PITTING DAMAGE ON EXTERIOR SKIN BS 360+5 STR 5L AND REPAIRED IAW ASA EA 900ER-53EA-27772, REMOVED DAMAGED STR 5L AT STA 365 AND REPAIRED IAW B737-900 SRM 53-00-03-2R-3 AND EA 900ER-53EA-27772. REPAIR IS CATEGORY B WITH STAGE 1&2 APPROVAL WITH INITIAL INSPECTION THRESHOLD OF 50,000 TOTAL FLIGHT CYCLES, IAW BOEING COMMUNICATION CPZ-ASA-24-0192.