# JASC 5714: Wing, Center Box

- Type: JASC system/component code (FAA)
- ATA chapter: 57 Wings
- Title in the code table: WING, CENTER BOX
- Service difficulty reports: 1,451
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=53
- Page: https://openairdocs.org/jasc/5714

## What it covers

For reports pertaining to the center wing box structure.

## Service difficulty reports (1,451, newest 50)

- [SDR AALA202606154697](https://openairdocs.org/sdr/AALA202606154697), Jun 5, 2026: Boeing 737823. ATTACH ANGLE. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN CENTER SECTION REAR SPAR VERTICAL PRESSURE DECK ATTACH ANGLE AT BS 663 AND LBL 25 (N808NN)
- [SDR IPXA2026042984389](https://openairdocs.org/sdr/IPXA2026042984389), Apr 26, 2026: Boeing 75724APF. PANEL. CORRODED. NR 1 PYLON PANEL 433FL AFT VERTICAL ATTACHMENT HAS FRETTING CORROSION. (N440UP)
- [SDR IPXA2026052281357](https://openairdocs.org/sdr/IPXA2026052281357), Apr 13, 2026: Airbus A300F4622R. SKIN. CRACKED. NR 1 PYLON, L/H SIDE, RIB 8, AFT SUPPORT STRUCTURE WITH CRACK. AFTER DETAIL VISUAL INSPECTION CRACK WAS FOUND CRACK LENG (N141UP)
- [SDR AALA202604066848](https://openairdocs.org/sdr/AALA202604066848), Apr 4, 2026: Boeing 737823. ANGLE. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN WING CENTER SECTION REAR SPAR VAPOR BARRIER UPPER ATTACH ANGLE AT STA 663.2, RBL  (N951NN)
- [SDR AALA202604101003](https://openairdocs.org/sdr/AALA202604101003), Apr 2, 2026: Boeing 737823. WEB. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN WING CENTER SECTION REAR SPR VERTICAL PRESSURE DECK WEB AT STA 663 AND LBL 44. RE (N991AN)
- [SDR AALA202603127160](https://openairdocs.org/sdr/AALA202603127160), Mar 12, 2026: Boeing 737823. WEB. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACKS IN WING CENTER SECTION REAR SPAR VERTICAL PRESSURE DECK WEB AT BS 663, FROM LBL 31. (N989AN)
- [SDR AALA202603128966](https://openairdocs.org/sdr/AALA202603128966), Mar 4, 2026: Boeing 737823. ANGLE. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN WING CENTER SECTION REAR SPAR VAPOR BARRIER ATTACH ANGLE AT BS 663, S23L, AND LBL (N990AN)
- [SDR AALA202602272486](https://openairdocs.org/sdr/AALA202602272486), Feb 27, 2026: Boeing 737823. ANGLE. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN WING CENTER SECTION REAR SPAR VAPOR BARRIER ATTACH ANGLE AT BS 663 AND LBL 5. REP (N338PK)
- [SDR IPXA2026030243996](https://openairdocs.org/sdr/IPXA2026030243996), Feb 4, 2026: Boeing 75724APF. PANEL. CRACKED. NR 2 PYLON GAP PANEL HAS A CRACK IN LOWER SURFACE. INSTALLED ONE DOUBLER & FILLER WASHERS IAW SRM 51-40-02, AND SRM 57-4 (N427UP)
- [SDR AALA202601274833](https://openairdocs.org/sdr/AALA202601274833), Jan 20, 2026: Boeing 737823. ANGLE. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN WING CENTER SECTION REAR SPAR VAPOR BARRIER ATTACH ANGLE AT BS 663.5, RBL 9. REPL (N948NN)
- [SDR AALA202601272520](https://openairdocs.org/sdr/AALA202601272520), Jan 20, 2026: Boeing 737823. ANGLE. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN WING CENTER SECTION REAR SPAR VAPOR BARRIER ATTACH ANGLE AT BS 663.5, LBL 31. REP (N948NN)
- [SDR AALA202601277258](https://openairdocs.org/sdr/AALA202601277258), Jan 13, 2026: Boeing 737823. ANGLE. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN WING CENTER SECTION REAR SPAR VAPOR BARRIER ATTACH ANGLE AT BS 663, RBL 23. REPAI (N970NN)
- [SDR AALA202601271318](https://openairdocs.org/sdr/AALA202601271318), Jan 12, 2026: Boeing 737823. ANGLE. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN WING CENTER SECTION REAR SPAR VAPOR BARRIER ATTACH ANGLE AT BS 663, LBL 18. REPAI (N970NN)
- [SDR AALA202509082078](https://openairdocs.org/sdr/AALA202509082078), Sep 8, 2025: Boeing 737823. ANGLE. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN WING CENTER SECTION REAR SPAR VAPOR BARRIER UPPER ATTACH ANGLE LOCATED IN RIGHT H (N301NW)
- [SDR AALA202509080517](https://openairdocs.org/sdr/AALA202509080517), Sep 8, 2025: Boeing 737823. ANGLE. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN WING CENTER SECTION REAR SPAR VAPOR BARRIER UPPER ATTACH ANGLE LOCATED IN LEFT HA (N301NW)
- [SDR AALA202509306582](https://openairdocs.org/sdr/AALA202509306582), Sep 5, 2025: Boeing 737823. ANGLE. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN CENTER SECTION REAR SPAR VAPOR BARRIER SUPPORT ANGLE AT BS 663.5, LBL 2. REPAIRED (N937NN)
- [SDR AALA202508180663](https://openairdocs.org/sdr/AALA202508180663), Aug 14, 2025: Boeing 737823. VAPOR BARRIER. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN WING CENTER SECTION REAR SPAR VAPOR BARRIER, RIGHT HAND LOWER WHEEL WELL, AT BS 6 (N856NN)
- [SDR AALA202508188891](https://openairdocs.org/sdr/AALA202508188891), Aug 14, 2025: Boeing 737823. VAPOR BARRIER. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN WING CENTER SECTION REAR SPAR VAPOR BARRIER, RIGHT HAND LOWER WHEEL WELL, AT BS 6 (N856NN)
- [SDR AALA202508122688](https://openairdocs.org/sdr/AALA202508122688), Aug 8, 2025: Boeing 737823. SUPPORT ANGLE. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CENTER WING SECTION REAR SPAR MIDSPAN DIAGONAL SUPPORT ANGLE CRACKED AT BS 663. REPLACED D (N973AN)
- [SDR AALA202508058209](https://openairdocs.org/sdr/AALA202508058209), Aug 2, 2025: Boeing 737823. ANGLE. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN WING CENTER SECTION REAR SPAR VAPOR BARRIER ATTACH ANGLE AT STA 663, LBL 66. REPA (N935NN)
- [SDR AALA202508055618](https://openairdocs.org/sdr/AALA202508055618), Aug 2, 2025: Boeing 737823. ANGLE. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN WING CENTER SECTION REAR SPAR VAPOR BARRIER ATTACH ANGLE AT STA 663, RBL 23. REPA (N935NN)
- [SDR JR2R20250306782](https://openairdocs.org/sdr/JR2R20250306782), Mar 6, 2025: Emb ERJ170200LR. FITTING. CRACKED. RH AILERON QUADRANT ASSEMBLY IN THE RH MLG WHEEL WELL LOWER BRACKET IS CRACKED (N88326)
- [SDR SWAA2025040202312](https://openairdocs.org/sdr/SWAA2025040202312), Mar 5, 2025: Boeing 7377H4. BRACKET. CRACKED. CRACK ON BRACKET STRUCTURE WING CENTER SECTION LOCATED BS540 AND BS578 AT LEVEL BL6 KEEL BEAM 2025-168021<[01]. REPLACED (N287WN)
- [SDR SWAA2025020583004](https://openairdocs.org/sdr/SWAA2025020583004), Jan 4, 2025: Boeing 7378H4. ANGLE. CRACKED. CRACK ANGLE LOCATED BS695 AND BL 0 AT CENTER WING BOX 2024-779214 <[01] TOOL USED: TEMPERATURE CONTROLLER P/N P3015GOES0 (N8611F)
- [SDR AALA202412160940](https://openairdocs.org/sdr/AALA202412160940), Dec 15, 2024: Boeing 737823. FITTING. WORN. AIRCRAFT IN BASE MAINTENANCE: CENTER WING BOX FORWARD SPAR UPPER SHEAR FITTING LOCATED AT BS 540 AND LBL 40.87 WORN. REP (N951AA)
- [SDR AALA202411184303](https://openairdocs.org/sdr/AALA202411184303), Nov 16, 2024: Boeing 737823. FITTING. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN CENTER WING BOX FORWARD SPAR UPPER SHEAR FITTING AT BS 540 AND LBL 40.87. REPLACE (N931AN)
- [SDR AALA202411189858](https://openairdocs.org/sdr/AALA202411189858), Nov 16, 2024: Boeing 737823. FITTING. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN CENTER WING BOX FORWARD SPAR UPPER SHEAR FITTING AT BS 540 AND RBL 32.40. REPLACE (N931AN)
- [SDR SWAA2024112753522](https://openairdocs.org/sdr/SWAA2024112753522), Oct 26, 2024: Boeing 7377H4. ANGLE. CRACKED. CRACK ANGLE LOCATED BS663 AND RBL55 AT CENTER WING BOX 2024-672307<[01] TOOL USED: TEMPERATURE CONTROLLER P/N: P3015GOES (N201LV)
- [SDR AALA202408204774](https://openairdocs.org/sdr/AALA202408204774), Aug 20, 2024: Boeing 737823. FITTING. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN CENTER WING BOX FORWARD SPAR UPPER SHEAR FITTING AT BS 540 AND LBL 6.14. REPLACED (N952AA)
- [SDR AALA202408203198](https://openairdocs.org/sdr/AALA202408203198), Aug 20, 2024: Boeing 737823. FITTING. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN CENTER WING BOX FORWARD SPAR UPPER SHEAR FITTING AT BS 540 AND LBL 15.04. REPLACE (N952AA)
- [SDR AALA202408204018](https://openairdocs.org/sdr/AALA202408204018), Aug 20, 2024: Boeing 737823. FITTING. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN CENTER WING BOX FORWARD SPAR UPPER SHEAR FITTING AT BS 540 AND LBL 32.40. REPLACE (N952AA)
- [SDR DALA2024080607840](https://openairdocs.org/sdr/DALA2024080607840), Aug 5, 2024: Boeing 717200. WING ROOT. CORRODED. CORROSION ON LH CENTER WING UPPER SURFACE (WING BOX) BTW STGR 6-5 AND STGR 5-4 PAX CABIN. SUMMARY OF NRC 00693: CORROSIO (N717JL)
- [SDR SWAA2024061280808](https://openairdocs.org/sdr/SWAA2024061280808), Apr 29, 2024: Boeing 7377H4. ANGLE. CRACKED. CRACKED ANGLE BS 540 RBL 1. REPLACED THE ANGLE IAW SRM 51-40-02-0G, AND DWG 143A5240 SHEET 14 REV -. (N479WN)
- [SDR AALA202403062971](https://openairdocs.org/sdr/AALA202403062971), Mar 5, 2024: Boeing 737823. FITTING. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN CENTER WING BOX FORWARD SPAR UPPER SHEAR FITTING AT BS 540 AND LBL 15.04. REPLACE (N937AN)
- [SDR AALA202402144852](https://openairdocs.org/sdr/AALA202402144852), Feb 14, 2024: Boeing 737823. FITTING. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN CENTER WING BOX FORWARD SPAR UPPER SHEAR FITTING AT BS 540 AND LBL 15.04. REPLACE (N932AN)
- [SDR AALA202402147493](https://openairdocs.org/sdr/AALA202402147493), Feb 14, 2024: Boeing 737823. FITTING. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN CENTER WING BOX FORWARD SPAR UPPER SHEAR FITTING AT BS 540 AND LBL 32.40. REPLACE (N932AN)
- [SDR AALA202401240336](https://openairdocs.org/sdr/AALA202401240336), Jan 24, 2024: Boeing 737823. FITTING. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN CENTER WING BOX FORWARD SPAR UPPER SHEAR FITTING LOCATED AT BS 540 AND LBL 32.40. (N916AN)
- [SDR AALA202401243814](https://openairdocs.org/sdr/AALA202401243814), Jan 24, 2024: Boeing 737823. FITTING. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN CENTER WING BOX FORWARD SPAR UPPER SHEAR FITTING LOCATED AT BS 540 AND LBL 40.87. (N916AN)
- [SDR AALA202401058238](https://openairdocs.org/sdr/AALA202401058238), Jan 5, 2024: Boeing 737823. ANGLE. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN WING CENTER SECTION REAR SPAR VAPOR BARRIER ATTACH ANGLE AT STA 663.5, RBL 34. RE (N984NN)
- [SDR AALA202311065555](https://openairdocs.org/sdr/AALA202311065555), Oct 20, 2023: Boeing 737823. FITTING. NONE. AIRCRAFT IN BASE MAINTENANCE: CENTER WING BOX FORWARD SPAR UPPER SHEAR FITTING LOCATED AT BS 540 AND RBL 15.04 REPLACEME (N921AN)
- [SDR AALA202310160302](https://openairdocs.org/sdr/AALA202310160302), Oct 5, 2023: Boeing 737823. FITTING. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN CENTER WING BOX FORWARD SPAR UPPER SHEAR FITTING LOCATED AT BS 540 AND LBL 40.87. (N934AN)
- [SDR AALA202310255652](https://openairdocs.org/sdr/AALA202310255652), Sep 26, 2023: Boeing 737823. FITTING. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN CENTER WING BOX FORWARD SPAR UPPER SHEAR FITTING LOCATED AT BS 540 AND LBL 15.04. (N934AN)
- [SDR AALA202310252949](https://openairdocs.org/sdr/AALA202310252949), Sep 26, 2023: Boeing 737823. FITTING. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN CENTER WING BOX FORWARD SPAR UPPER SHEAR FITTING LOCATED AT BS 540 AND LBL 54.60. (N934AN)
- [SDR SWAA2023083189798](https://openairdocs.org/sdr/SWAA2023083189798), Aug 15, 2023: Boeing 7377H4. PANEL. CRACKED. WING CENTER SECTION BREAK PANEL IS CRACKED AT BS 540; RBL 1; WL 207<[01] REMOVED AND REPLACED WING CENTER SECTION BREAK  (N414WN)
- [SDR AALA202308142449](https://openairdocs.org/sdr/AALA202308142449), Aug 12, 2023: Boeing 737823. FITTING. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN CENTER WING BOX FORWARD SPAR UPPER SHEAR FITTING LOCATED AT BS 540 AND RBL 32.40. (N968AN)
- [SDR AALA202307269921](https://openairdocs.org/sdr/AALA202307269921), Jul 26, 2023: Boeing 737823. SHEAR ANGLE. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN CENTER WING BOX FORWARD SPAR UPPER SHEAR FITTING LOCATED AT BS 540 AND RBL 15.04. (N938AN)
- [SDR AALA202307261157](https://openairdocs.org/sdr/AALA202307261157), Jul 25, 2023: Boeing 737823. SHEAR ANGLE. CRACKED. AIRCRAFT IN BASE MAINTENANCE: CRACK IN CENTER WING BOX FORWARD SPAR UPPER SHEAR FITTING LOCATED AT BS 540 AND LBL 40.87. (N938AN)
- [SDR SWAA2023081476444](https://openairdocs.org/sdr/SWAA2023081476444), Jul 8, 2023: Boeing 7377H4. ANGLE. CRACKED. CRACK ANGLE FLOOR STRUCTURE STA 695 RBL 24.75 LOWER POSITION CENTER SECTION 2023-443687<[01] REPLACED ANGLE LOC.ON FLOOR (N296WN)
- [SDR DALA2023070605467](https://openairdocs.org/sdr/DALA2023070605467), Jul 5, 2023: Airbus A319114. UNKNOWN. UNKNOWN. SHIP 3123 CORROSION WAS FOUND ON TH EXTERNAL SKIN, UPPER SURFACE OF THE CENTER FUEL TANK BETWEEN FR41 - FR42 AND Y1292 - (N323NB)
- [SDR DALA2023070205284](https://openairdocs.org/sdr/DALA2023070205284), Jun 29, 2023: Airbus A350941. UNKNOWN. UNKNOWN. AIRCRAFT 3569, FASTENER HOLE DIAMETER AT F355 & F356 FOUND AT FIRST OVERSIZE DIMENSION OF 0.7645'.FASTENER HOLE DIAMETER (N569DZ)

All 1,451: https://openairdocs.org/jasc/5714/reports.md

## Other codes in chapter 57

- [JASC 5700](https://openairdocs.org/jasc/5700): Wing Structure (2,401 reports)
- [JASC 5710](https://openairdocs.org/jasc/5710): Wing Main, Frame Structure (4,451 reports)
- [JASC 5711](https://openairdocs.org/jasc/5711): Wing Spar (5,583 reports)
- [JASC 5712](https://openairdocs.org/jasc/5712): Wing, Rib/Bulkhead (6,956 reports)
- [JASC 5713](https://openairdocs.org/jasc/5713): Wing, Longeron/Stringer (2,091 reports)
- [JASC 5720](https://openairdocs.org/jasc/5720): Wing Miscellaneous Structure (13,621 reports)
- [JASC 5730](https://openairdocs.org/jasc/5730): Wing, Plate/Skin (27,221 reports)
- [JASC 5740](https://openairdocs.org/jasc/5740): Wing, Attach Fittings (3,003 reports)
- [JASC 5741](https://openairdocs.org/jasc/5741): Wing, Fuselage Attach Fittings (544 reports)
- [JASC 5742](https://openairdocs.org/jasc/5742): Wing, Nacelle/Pylon Attach Fittings (258 reports)
- [JASC 5743](https://openairdocs.org/jasc/5743): Wing, Landing Gear Attach Fittings (3,097 reports)
- [JASC 5744](https://openairdocs.org/jasc/5744): Wing, Control Surface Attach Fittings (2,716 reports)
- [JASC 5750](https://openairdocs.org/jasc/5750): Wing, Control Surfaces (1,157 reports)
- [JASC 5751](https://openairdocs.org/jasc/5751): Ailerons (5,078 reports)
- [JASC 5752](https://openairdocs.org/jasc/5752): Aileron Tabs (654 reports)
- [JASC 5753](https://openairdocs.org/jasc/5753): Trailing Edge Flaps (31,484 reports)
- [JASC 5754](https://openairdocs.org/jasc/5754): Leading Edge Devices (17,332 reports)
- [JASC 5755](https://openairdocs.org/jasc/5755): Spoilers (4,550 reports)
- [JASC 5797](https://openairdocs.org/jasc/5797): Wing System Wiring (81 reports)

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