What was found
DURING HEAVY MAINTENANCE: FUSELAGE / TAILCONE / FIREWALL / FR 81-83 LH & RH / DEVIATIONS TO SB A320-53-1500 (FIXATION OF APU AIR INTAKE DUCT MOD) - PERMANENT REPAIR; REFERENCES: /1/ AEROMAN EA 53-0014-25 REV. 0 (COVER + PART 1) /2/ AIRBUS MESSAGE 81559155/008 /3/ AIRBUS TD/81180000/006/2023#A /4/ AIRBUS RDAF 81559155/003/2025#A /5/ AIRBUS SB A320-53-1500 (JETBLUE EC/TC A320-53-1500). DURING THE CURRENT (4/2025) M3 CHECK FOR A/C N591JB IN SAL, AEROMAN REPORTED THAT DEVIATIONS WERE REQUIRED DURING THE ACCOMPLISHMENT OF THE REF /5/ SB +JB EC/TC FOR THE MODIFICATION OF THE APU AIR INTAKE DUCT ON THE TAILCONE FIREWALL BETWEEN FR 81-83 LH/RH SIDES. THE DEVIATIONS REQUIRED ARE AS FOLLOWS: DEVIATION 1 (LAYOUT) • REFER TO STEP 47 OF REF /5/ TC• LH FIREWALL CUTOUT BETWEEN FR 81-83 ADJUSTMENTS WERE NEEDED AT UPPER AND LOWER POSITION OF THE CUT-OUT FOR CORRECT ALIGNMENT. DEVIATION 2 (OPEN PILOT HOLES ON RHS COVER)• REFER TO STEPS 139-146 OF REF /5/ TC• 3 PILOT HOLES ON ITEM 42 (COVER P/N D53585529200) RHS WERE REPORTED.• HOLES TO BE PLUGGED IN ACCORDANCE WITH THE REF /3/TD USING BLIND. DEVIATION 3 (PART INTERCHANGEABILITY) THE FOLLOWING PARTS ARE REQUIRED TO USE ALTERNATES, DUE TO THE PNS RECEIVED IN THE SB KITS:• PN D5358551100400 INSTEAD OF D5358551100000 (REFER TO STEPS 64 & 73 OF REF /5/ TC)• PN D5358551500200 INSTEAD OF D5358551500000 (REFER TO STEPS 65 & 74 OF REF /5/ TC)• PN D5358551100600 INSTEAD OF D5358551100200 (REFER TO STEPS 124 & 134 OF REF /5/ TC)•PN D5358553200200 INSTEAD OF D5358553200000 (REFER TO STEPS 126 & 135 OF REF /5/ TC)• PN D5358550700200 INSTEAD OF D5358550700000 (REFER TO STEPS 202 & 206 OF REF /5/ TC). AIRBUS WAS CONTACTED FOR REPAIR DISPOSITION/APPROVAL FOR ALL DEVIATIONS. AIRBUS PROVIDED THE REF /2/ MESSAGE AND REF /3/ TD WITH INSTRUCTIONS TO PERFORM DEVIATIONS AS REQUESTED. ALL OTHER REQUIREMENTS SHOULD BE FOLLOWED PER REF /5/ SB +JB EC/TC. THESE INSTRUCTIONS ARE APPROVED BY THE REF /4/ RDAF AS PERMANENT, WITH NO POST REPAIR INSPECTIONS REQUIRED. THIS EC ACCOMPLISHES THE PERMANENT REPAIR PER THE REF /1/ EA AND COMPLIES WITH THE REF /4/ RDAF WITHOUT DEVIATION. SUBSTANTIATION: THIS PERMANENT, CATEGORY A, REPAIR HAS BEEN APPROVED VIA REF /4/ RDAF AND IS CLASSIFIED AS MAJOR.(E/C: A25-363-01)