What was found
DURING HEAVY MAINTENANCE: FUSELAGE / REAR FUSELAGE / LOWER SKIN PANEL / FR64-FR65 BETWEEN STGR43L-STGR44 / CORROSION AND ELONGATED HOLE - TIME LIMITED REPAIR; REFERENCES: /1/ AEM EA 53-0094-25 (COVER + PARTS 1-4) /2/ AIRBUS DOSSIER 81702291 /3/ AIRBUS RDAF 81702291/004/2025#A /4/ TD/81702291/039/2025#A. DESCRIPTION: DURING CURRENT M2 CHECK ON N583JB (MSN: 02150 ) AT AEROMAN, WHILE PERFORMING MPD TASK 534144-01, CORROSION WAS FOUND ON THE INTERNAL LOWER SKIN AT THE LEVEL OF FR65, BETWEEN STGR43L AND STGR44 (P/N: D5348001620000). THERE WERE NO APPLICABLE ADL FOUND IN THE SRM FOR THIS AREA. SEE REF /1/ AEM EA FOR MORE DETAILS. CORROSION WAS REMOVED PER SRM GUIDELINES, NDT INSPECTION WAS CARRIED OUT, A SHEAR CLIP WAS REMOVED AND A CUT-OUT AT STGR 43LH BETWEEN FR64-FR66 WAS PERFORMED TO GAINS ACCESS. REPAIR INSTRUCTIONS WERE GIVEN AFTER CONTACTING AIRBUS THROUGH REF /2/ AIRBUS DOSSIER 81702291 AND ARE TO BE ACCOMPLISHED AS PER REF /4/ TD. REPAIRS WERE BASED ON THE PRINCIPLES OF SRM TASK 53-41-11-300-093, A SMALL SKIN CUT-OUT WAS PERFORMED CONSIDER THAT DIMENSION OF THE CUT OUT DO NOT EXCEED 2 FASTENER PITCHES, AND THE FOLLOWING DEVIATIONS WERE CONSIDER: FILLER MADE FROM 2024-T3 WAS INSTALLED, TWO DISCREPANCIES FASTENER PITCH WERE IDENTIFIED DUE TO THE SHAPE OF THE AREA, HOLES COMMON TO THE REINFORCEMENT WAS OVERSIZED AND COLD WORKING WAS PERFORMED CW TOOL 4-4-N WAS USED, HL11VF6 WAS INSTALLED IN INTERFERENCE FIT. FOR STGR 43LH REPAIR WAS CARRIED OUT IN ACCORDANCE WITH SRM TASK A320 SRM TASK 53-41-13-300-004, STRINGER COUPLING WAS INSTALLED BETWEEN FR65 AND FR66, NEW SAME TYPE OF FASTENERS OR OVZ AS REQUIRED WERE INSTALLED AS PER PRODUCTION DRAWINGS AND SURFACE PROTECTION WAS RESTORED. SEE REF /1/ AEM EA FOR MORE DETAILS. AIRBUS PROVIDED REF /4/ TD WITH REPAIR DISPOSITION AND A PENDING 6 MONTHS DTA. EC A25-1160-01 IS ISSUED TO ACCOMPLISH THE TIME LIMITED REPAIR IAW REF /3/ AIRBUS RDAF. EC A25-1160-02 IS FOR THE PENDING 6 MONTHS DTA (PENDING OEM) PER REF /3/ AIRBUS RDAF. SUBSTANTIATION: THIS TIME LIMITED REPAIR IS APPROVED BY REF /3/ AIRBUS RDAF AND IS CLASSIFIED AS MAJOR. (E/C: A25-1160-01)