# SDR UPS405552

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 5, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N691UP](https://openairdocs.org/aircraft/N691UP), registered now
- Make and model: Boeing 747121
- Aircraft serial: 19641
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Fasteners
- Condition: Loose
- Location: Bs 1840-1860
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS405552

## Discrepancy

WHILE IN AMS FOR C-CHECK MAINTENANCE REPORTED, LOOSE FASTENERS IN UPPER WEB OF TORQUE BOX BS 1840 TO 1860 BETWEEN RBL 25 TO 45.  REPLACED UPPER WEB AND REPLACED BLIND FASTENERS FOR SOLID FASTENERS PER SRM 51-30-02.

---
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.