# SDR SWAA2021081095253
- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 15, 2021
- Submitted: August 10, 2021
- Operation: Air carrier
- Aircraft: [N7723E](https://openairdocs.org/aircraft/N7723E), registered now
- Make and model: Boeing 737-76N
- Registry model: [Boeing 737-76N](https://openairdocs.org/model/boeing-737-76n) (OpenAirDocs)
- Aircraft serial: 32670
- Aircraft time: 48,099 hours, 24,239 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- Condition: Corroded
- Location: Bs 441-458 Lbl24
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2021081095253
## Discrepancy
CORROSION ON FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT AT BS 441 TO 458 LBL 24 WL 156 ; / [01] REMOVED CORROSION ON FLOOR TO SIDEWALL SUPPORT AT BS 400+6'; LBL24; WL 156 PER SRM51-10-02-0G-0 MEASURE L=1'X W=0.75'X D=0.006' MAX. MAT LOSS IS 0.006'; REMAINING THICKNESS IS 0.006'; ORIGINAL THICKNESS IS 0.040' (BAC1496-444) FOUND TO BE OUT OF LIMITS; REWORKED AREA PER B737-700 SRM53-00-53-1A-2; ALLOWABLE DAMAGE PARAG. 4.A [07] FABRICATED; LOCATED AND DRILLED NEW FCB SIDEWALL SUPPORT BS396-500D LBL24 WL156 IAW SRM 51-40-05-0G-0 AND DRAWING# 143A7501; MATERIAL USED BAC1496-444 7075-T6 LOT#1453146-2.
FABRICATED; LOCATED AND DRILLED SPLICE REPAIR AT SIDEWALL SUPPORT BS490 LBL24 WL156 IAW SRM 53-00-53-2R-6 REPAIR#6 MATERIAL USED BAC1496-444 7075-T6 LOT#1453146-2.
OK TO TREAT AND PRIME; [08] CORRECTED REPAIR TYPE TO MAJOR REPAIR.12] OK TO INSTALL NEW FLOOR TO SIDEWALL SUPPORT FROM BS400 TO BS500D LBL24 WL156; [13] VERIFIED CORRECTIVE ACTION ITEM 12. OK TO INSTALL; [14] INSTALLED NEW FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT AT BS400 TO BS500D LBL24 WL156 IAW SRM 51-40-02-0G-0 AND DWG #143A7500;
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