# SDR SWAA2021100512758

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 28, 2021
- Submitted: October 5, 2021
- Operation: Air carrier
- Aircraft: [N7885A](https://openairdocs.org/aircraft/N7885A), registered now
- Make and model: Boeing 737-76N
- Registry model: [Boeing 737-76N](https://openairdocs.org/model/boeing-737-76n) (OpenAirDocs)
- Aircraft serial: 33379
- Aircraft time: 58,530 hours, 28,804 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Seat Track
- Condition: Cracked
- 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/SWAA2021100512758

## Discrepancy

CRACK NOTED ON LBL24.75 POSITION 'B' HOLE ; CRACK NOTED ON SEAT TRACK BS 727B LBL24.75 POSITION 'B' HOLE; CRACK LENGTH 0.030' / [01] ACCOMPLISHED FIRST OVERSIZE CLEANUP REAM TO FASTENER HOLE TO A MINIMUM OF 0.016' AS PER REFERENCE NDT PART 6; 51-00-00; PROCEDURE 16.; [02] PERFORMED HFEC ROTO INSP. ON REAM FASTENER HOLE IAW B737 NDT PART 6; 51-00-00; PROCEDURE 16. CRACK REMAINS <BR>TOOL: NORTEC 600 B/C: 166316 DUE: 10/21<BR>TOOL: OLYMPUS MINIMITE B/C:160006 DUE:1/22; [03] REAMED DISCREPANT HOLE CONCENTRICALLY IN 1/64 INCH INCREMENTS TO SECOND OVERSIZE AS PER REFERENCE B737-700 NDT PART 6; 51-00-00; PROCEDURE 16.<BR>FASTENER HOLE DIAMETER AFTER BEING REAMED FOR SECOND TIME 0.281''.; [04] C/W; [05] PERFORMED HFEC ROTO INSP. ON SECOND OVERSIZE REAM FASTENER HOLE @ LBL24.75 IAW B737 NDT PART 6; 51-00-00; PROCEDURE 16. NO CRACK. EQUIP: NORTEC 600 B/C 172389 CAL DUE: 7/22; [06] PERFORMED EA 21-153-02515. REF FAULT TTG8Q006784K.; [07] VERIFIED PERFORMED EA 21-153-02515. REF FAULT TTG8Q006784K.

---
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.