STC ST12464DE

ST12464DE ARI Aerospace, LLC 1003 N Erie Ave, Suite 3, Building 3 Pueblo, CO 81001 Part 25 Title 14 CFR TCDS A28NM Rev 55 Airbus SAS A320-214, A320-251N, A321-251NX The installation of replacement back and bottom cushions with covers must be in accordance with MDL1001 Revision F Dated August 18, 2026 or later FAA approved revision. Limited to installation on Airbus SAS, A320-214, A320-251N, and A321-251NX with Manufacturer Serial Numbers listed below installed on Recaro P/N 3510H944-(XX)-(XXX) seat models. (cont'd) 05/23/2025 08/20/2026 for Manager, West Certification Branch 4 Installation of ARI Aerospace replacement back seat cushion part number 139-00-618-83-EZY, bottom seat cushion part number 139-00-634-5X-EZY, and dress covers 944-00-703-02-EZY and 944-00-7XX-02-EZY (listed on page 4) onto Recaro 3510H944-( )-( ) FAA TSO-C127a / ETSO-C127a seats installed in easyJet’s A320-214 (A320ceo), A320-251N (A320neo), and A321-251NX (A321neo) aircraft.

ST12464DE 08/20/2026 4

ST12464DE 08/20/2026 Airbus SAS, A320-214 Manufacturer Serial Numbers 3805, 3843, 3871, 3909, 3913, 3922, 3946, 3953, 3975, 3979, 3991, 4006, 4012, 4014, 4034, 4157, 4179, 4196, 4219, 4233, 4234, 4250, 4286, 4554, 4556, 4588, 4591, 4636, 4646, 4676, 4680, 4708, 4721, 4740, 4749, 5019, 5020, 5046, 5052, 5056, 5064, 5104, 5111, 5113, 5116, 5138, 5146, 5150, 5187, 5201, 5224, 5236, 5249, 5318, 5319, 5542, 5592, 5688, 5702, 5739, 5757, 5785, 5844, 5874, 5926, 5927, 5981, 6004, 6011, 6047, 6095, 6107, 6177, 6188, 6192, 6257, 6267, 6282, 6320, 6335, 6353, 6412, 6416, 6422, 6447, 6485, 6502, 6509, 6525, 6541, 6546, 6550, 6562, 6565, 6568, 6572, 6587, 6605, 6606, 6633, 6640, 6674, 6675, 6680, 6754, 6788, 6824, 6831, 6834, 6837, 6856, 6877, 6885, 6892, 6918, 6927, 6966, 6970, 6977, 6981, 7040, 7044, 7067, 7093, 7104, 7132, 7177, 7183, 7228, 7235, 7243, 7340, 7372, 7410, 7460, 7490, 7537, 7549, 7572, 7580, 7597, 7632, 7637, 7660, 7665, 7687, 7693, 7730, 7750, 7762, 7772, 7779, 7785, 7904, 8065, 8068, 8075, 8119, 8162, 8165, 8263, 8299, 8321, 8344, 8358, 8381, 8385, 8390.

Airbus SAS, A320-251N Manufacturer Serial Numbers 7649, 7705, 7802, 7841, 8110, 8193, 8243, 8268, 8304, 8338, 8356, 8375, 8405, 8409, 8411, 8433, 8505, 8506, 8662, 8681, 8722, 8759, 8880, 8920, 8963, 8982, 8998, 9014, 9036, 9103, 9105, 9110, 9111, 9171, 9504, 9510, 10053, 10102, 10114, 10118, 10142, 10186, 10701, 10849, 10863, 11234, 11244, 11530, 11563, 11576, 11617, 11707, 11769, 11804, 11835, 11878, 11896, 11920, 11970, 11975, 11989, 11994, 11997, 12114, 12139, 12162, 12193, 12334, 12357, 12383, 12522, 12551, 13242.

Airbus SAS, A320-251NX Manufacturer Serial Numbers 8314, 8369, 8386, 8421, 8454, 8508, 9204, 9214, 9227, 9258, 9310, 9399, 9422, 9468, 10048, 11810, 12084, 12092, 12163, 12916, 13027, 13101, 13105, 13163, 13181, 13232, 13256, 13297.

This installation should not be incorporated in any aircraft unless it is determined that the interrelationship between this installation and any previously approved configuration will not introduce any adverse effect upon the airworthiness of the aircraft.

ST12464DE 08/19/2026 Description of Type Design Changes (Cont.)

Part Number Description 139-00-618-83-EZY Back Cushion, STD 139-00-634-58-EZY Bottom Cushion, Standard, 460 139-00-634-57-EZY Bottom Cushion, Standard, 470 139-00-634-55-EZY Bottom Cushion, Standard, 480 139-00-634-51-EZY Bottom Cushion, Standard, 490 139-00-634-53-EZY Bottom Cushion, IAT, 490 139-00-634-54-EZY Bottom Cushion, IAT, LH, 490 139-00-634-59-EZY Bottom Cushion, IAT, RH, 490 139-00-634-56-EZY Bottom Cushion, OWE, 490 944-00-703-02-EZY Back Cover with Coat Hook 944-00-745-02-EZY Bottom Cover, Standard, 460 944-00-744-02-EZY Bottom Cover, Standard, 470 944-00-742-02-EZY Bottom Cover, Standard, 480 944-00-739-02-EZY Bottom Cover, Standard, 490 944-00-740-02-EZY Bottom Cover, IAT, 490 944-00-741-02-EZY Bottom Cover, IAT, LH, 490 944-00-746-02-EZY Bottom Cover, IAT, RH, 490 944-00-743-02-EZY Bottom Cover, OWE, 490 61001001 STC Tag Kit – A320 61001003 STC Tag Kit – A321 4 4 Add Page