# SDR UPS04443504

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 29, 2004
- Submitted: November 19, 2004
- Operation: Air carrier
- Aircraft: N521UP
- Make and model: Boeing 747-200
- Registry model: [Boeing 747-200](https://openairdocs.org/model/boeing-747-200) (OpenAirDocs)
- Aircraft serial: 21944
- Aircraft time: 73,613 hours, 17,591 cycles
- System (JASC): [5712 · Wing, Rib/Bulkhead](https://openairdocs.org/jasc/5712)
- Part: Rib
- Condition: Cracked
- Location: Lt Wing
- 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/UPS04443504

## Discrepancy

L/E PNL SUPPORT RIB FOUND CRACKED AT WS 1420 JUST O/B OF NR 1 L/E FLAP PDU.  L/E PNL SUPPORT RIB REPAIRED AS PER HX RS NR R57-41-35209 JUST AT WS 1420 O/B OF NR 1 L/E FLAP PDU.  REFER UPS EO NR B747-5740-21328-A

---
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.