# SDR SWAA2021120644171

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 15, 2021
- Submitted: December 6, 2021
- Operation: Air carrier
- Aircraft: [N914WN](https://openairdocs.org/aircraft/N914WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36622
- Aircraft time: 45,576 hours, 27,409 cycles
- System (JASC): [5311 · Fuselage Main, Frame](https://openairdocs.org/jasc/5311)
- Part: Frame
- Condition: Corroded
- Location: Fuselage
- 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/SWAA2021120644171

## Discrepancy

WHILE INSPECTING FOR CORROSION IN ACB; FOUND CRACKED DRILL START ON UNDERSIDE OF FRAME AT BS 947; RBL 20; BELOW RH FLOOR-TO-SIDEWALL SUPPORT (MARKED) ; / [01] AFTER FURTHER EVALUATION FRAME ACB AT BS 947; RBL20 FOUND TO BE OUT LIMIT; CRACK LENGHT 0.500' IAW SRM 53-00-07-1A-1; [02] VERIFIED ACB FRAME AT BS 947; RBL 20; FOUND OUT OF LIMITS PER SRM 53-00-07-1A-1; [03] REMOVED FRAME ACB AT BS 947 RBL 27 TO LBL 28 IAW SRM 51-40-02-0G-0; [04] RECEIVED NEW FRAME BS 947 FROM RBL 27 TO LBL 28 WL 161 P/N 147A1047-111 PO# 792341/1.<BR><BR>LOCATED AND DRILLED NEW FRAME AT BS 947 FROM RBL 27 TO LBL 28 WL 161 IAW SRM 51-40-05 AND DWG 147A1047 ID:107; REV:-.<BR><BR>OK TO INSTALL; [05] VERIFIED CORRECTIVE ACTION ITEM 4.

---
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.