# SDR SWAA2022042190008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 31, 2022
- Submitted: April 22, 2022
- Operation: Air carrier
- Aircraft: N769SW
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 30588
- Aircraft time: 74,146 hours, 43,614 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- Part number: 143A75014
- Condition: Corroded
- Location: Fwd Cargo Bay
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2022042190008

## Discrepancy

CORROSION ON FWD CARGO COMPARTMENT R/H FLOOR TO SIDEWALL SUPPORT AT STA 500A+5 TO STA 500C+15; RBL 24; WL 156. / [01] VERIFIED APPLICABILITY FOR ALLOWABLA DAMAGE LIMITS OF FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT BS 500A+5 TO 500C+15 ;RBL 24 ;WL 156.IAW SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2.;[02] REMOVED CORROSION ON FWD CARGO COMPARTMENT R/H FLOOR TO SIDEWALL SUPPORT ( BTW STA 500A+5'500C+15';RBL 24 ;WL 156;IAW SRM 51-10-02 PARAGRAPH 15); EVALUATED ALL REWORKED AREAS;THE DEPPEST AREA BS 500A+5 RBL 24 WL 156; DIMENSION:L=2'X W=1'X DEPTH=0.011';ORIGINAL THICKNESS 0.040 REMAINING THICKNESS 0.029; FOUND TO BE OUT OF LIMITS ALLOWABLE DAMAGE LIMITS;IAW SRM 53-00-53-1A-2;ALLOWABLE DAMAGE 2 FIGURE#103 ;DEATIL 'E';TOOL USED MICROMETER ID ATS400 S/N UNKNOWN;DUE 08/2022;[03] VERIFIED ACTION 1;2;[04] FABRICATED LOCATED AND DRILLED ON FWD CARGO COMPARTMENT R/H NEW FLOOR TO SIDEWALL SUPPORT BS 500A TO BS 500D RBL 24 WL 156;MATERIAL USED BAC1496-444#7075T62;EXTRUSION;LOT#1485395-1;IAW SRM 51-40-05 AND DWG 143A7501 REV:A.APPLY CHEMICAL CONVERSION COATING AND PRIMER.;[05] INSPECTED ACTION 4;[06] APPLIED CHEMICAL CONVERSION COATING AND PRIMER FWD CARGO COMPARTMENT R/H NEW FLOOR TO SIDEWALL BS 500A TO BS 500D RBL 24 WL 156 IAW SRM 51-20-01 AND AMM 51-21-72-370-804.;[07] VERIFIED CORRECTIVE ACTION ENTRY 6. CARD COMPLETE.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.