# SDR SWAA2021081191813

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 6, 2021
- Submitted: August 11, 2021
- Operation: Air carrier
- Aircraft: N750SA
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29802
- Aircraft time: 75,691 hours, 44,551 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Bracket
- Condition: Cracked
- Location: Bs 727b
- 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/SWAA2021081191813

## Discrepancy

CRACK NOTED IN BOTTOM LAYER OF HOLE AT RBL 45.5 SEAT TRACK AT BS-727B. ; / [01] REMOVED FASTNERS IN H BRACKET BS 727B RBL 45.5 PER SRM 51-40-02-OG-0; [02] ET INSPECTED HOLE IAW 737 NDTM PART 6 51-00-00 PROCEDURE 16; NO CRACKS NOTED.<BR><BR>CAL ID ATS1645 N600; [03] COMPLETED H-BRACKET REMOVAL PRIOR TO NDT OPEN HOLE INSPECTION; [04] UPDATED MEASUREMENTS TABLE; [05] VERIFIED MEASUREMENT TABLE; [06] FINAL HOLE SIZE MEASURED AT .246' USING BALL GAUGE ATS S829EZ-H3-1; CALIPER ATS1317;S/N:NSN;DUE 06/2022; [07] VERIFIED FINAL HOLE SIZE.; [08] LOCATED AND DRILLED NEW STRAP P/N 146A5342-26 AT BS 727B RBL 45.5 WL207 IAW SRM 51-40-05-OG-0; [09] OK TO INSTALL NEW STRAP P/N 146A5342-26; [10] VERIFIED STEPS 8 AND 9 OK TO INSTALL; [11] INSTALLED NEW STRAP IAW SRM 51-40-02-OG-0; [12] INSTALLED NEW STRAP IAW SRM 51-40-02-OG-0; [13] COMPLETED INSTALLATION OF STRAP P/N 146A5342-26 AT BS 727B RBL 45.5 WL207 IAW SRM 51-40-02-OG-O; [14] COMPLETED INSTALLATION OF STRAP P/N 146A5342-26 AT BS 727B RBL 45.5 WL207 IAW SRM 51-40-02-OG-O AND SB 737-53-1296; [15] UPDATED INSTALLATION REFERENCE TO INCLUDE SERVICE BULLETIN; [16] VERIFIED INSTALLATION OF STRAP P/N 146A5342-26 AT BS 727B RBL 45.5 WL207 IAW SRM 51-40-02-OG-O AND SB 737-53-1296; [17] COMPLETE

## Service documents this report cites (1) (OpenAirDocs)

Manufacturers' service documents named in its text, read by OpenAirDocs, so check each against the text.

- [Boeing Special Attention Service Bulletin 737-53-1296](https://openairdocs.org/service-documents/boeing/sb-737-53-1296.md). Cited as "SB 737-53-1296". OpenAirDocs has a copy

---
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.