# SDR SWAA2021101418463

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 15, 2021
- Submitted: October 14, 2021
- Operation: Air carrier
- Aircraft: [N904WN](https://openairdocs.org/aircraft/N904WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36616
- Aircraft time: 45,638 hours, 27,243 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Angle
- 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/SWAA2021101418463

## Discrepancy

FWD CARGO LH TRANSITION ANGLE FROM STA 500-500D; WL 156.5 AT LBL 24 HAS AREAS OF CORROSION AT FASTENER HOLES. (MARKED) ; / [01] WHILE REMOVING CORROSION ;FOUND AREA OUT OF LIMITS PER SRM 53-00-53-1A-2.[0.0 08] REMOVED; [02] LOCATED AND DRILLED HOLES FROM STA 490 TO STA 500D LBL 24(EXISTING SPLICE). PER SRM 51-40-05; [03] APPLIED ALODINE TO PARTS PER SRM 51-20-01; [04] VERIFIED CORRECTIVE ACTIONS 2 AND 3; [05] MATCH DRILLED REPLACEMENT TRANSITION ANGLE PER SRM 51-40-02; INSTALLATION ON FAULT 5330-E-16461-NG (CPCP/AD MOC - FWD CARGO COMPARTMENT FLOOR STRUCTURE CORROSION PROTECTION) [TTG8Q004E4SE]; [06] C/W INSPECTION.

---
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.