What was found
DURING HEAVY MAINTENANCE: FUSELAGE / AFT FUSELAGE / FR 66 RH / DOOR STOP FITTING 7 / CRACKS - PERMANENT REPAIR; REFERENCES: /1/ AEROMAN EA 53-0017-25 /2/ AIRBUS DOSSIER 81558284 /3/ AIRBUS RDAF 81558284/003/2025#A /4/ A320 SRM 53-41-12-300-011. DESCRIPTION: ON 4/2/2025, DURING THE CURRENT M2 CHECK AT SAL, N591JB (MSN 02246), WAS REPORTED WITH CRACK FINDINGS (QTY 2) AFFECTING THE REAR FUSELAGE FR 66 RH DOOR STOP FITTING #7 ON THE 2 OUTBOARD HOLES DURING ACCOMPLISHMENT OF SB A320-53-1288 INSPECTIONS. SEE REF. /1/ EA. THE DAMAGE WAS EVALUATED AGAINST SRM 53-41-12-300-008 BUT WAS FOUND OUT OF SRM LIMITS. AS A RESULT, AIRBUS WAS CONTACTED FOR DISPOSITION. THE DAMAGED HOLES WERE REAMED ECCENTRICALLY TO REMOVE THE CRACKS AT THE FRAME WEB, THE FRAME FLANGE WAS TRIMMED OUT TO REMOVE ADDITIONAL CRACKS AND FREEZE PLUGS WERE INSTALLED FOLLOWED BY REINFORCEMENT REPAIR PARTS INSTALLATION FOLLOWING REF. /4/ SRM GUIDELINES WITH DEVIATIONS. AIRBUS PROVIDED REF. /3/ RDAF APPROVING THE REPAIR AS PERMANENT CAT B WITH POST REPAIR INSPECTIONS. EC A25-336-01 IS ISSUED TO ACCOMPLISH THE PERMANENT REPAIR INSTRUCTIONS IN ACCORDANCE WITH REF. /3/ RDAF AND REF. /4/ SRM WITH DEVIATIONS. EC A25-336-02 IS ISSUED TO TRACK THE POST REPAIR INSPECTIONS OF THE EXTERNAL SURFACES OF THE FRAME WEB (FWD FACE) AND REPAIR PART WEB (AFT FACE) EXCEPTING UNDERNEATH THE SEAL PROFILE AND THE BRACKETS (THRESHOLD=13,000FC, INTERVAL=4,900FC, METHOD=HFEC AS PER SA NTM 51-10-08). EC A25-336-03 IS ISSUED TO TRACK THE POST REPAIR INSPECTIONS FOR THE FASTENER HOLES AT FRAME WEB, MACHINED REPAIR PART AND SEAL PROFILE/BRACKETS ATTACHMENTS AS WELL AS THE FASTENER HOLES AT FRAME INNER CAP AND REPAIR PART ATTACHMENT (THRESHOLD=144,000FC, INTERVAL=METHOD=TBD). NOTE: INSPECTIONS FOR FASTENER HOLES AT FRAME WEB, MACHINED PART AND SEAL PROFILE/BRACKETS ATTACHMENTS IS BEING COMBINED WITH THE INSPECTIONS FOR THE FASTENER HOLES AT FRAME INNER CAP AND REPAIR PART ATTACHMENT UNDER EC A25-336-03 DUE TO THE THRESHOLD BEING 144,000FC FOR BOTH INSPECTIONS WITH INTERVALS AND METHODS PENDING OEM INSTRUCTIONS FOR BOTH. SUBSTANTIATION: THIS PERMANENT REPAIR IS APPROVED VIA REF. /3/ RDAF AND IS CLASSIFIED AS MAJOR. (E/C: A25-336-01)