INGER S-22 AND S-23 (AIRPLANES WITH 27.500 OR MORE TOTAL FLIGHT CYCLES AS OF THE ORIGINAL ISSUE DATE OF THIS SERVICE BULLETIN) MOS 58 737-53-1294 RI TABLE REPAIR FUSELAGE - SKIN - LOWER BULKHEAD CHORDS AT BODY STATION 540- SKIN INSPECTION. CHORD SPLICE 1.3 INSTALLATION AND SKIN REPAIR. SERVICE BULLETIN THE CRACKING ON LEFT SIDE (AND) DO THE