# SDR UPS07450563

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 13, 2007
- Submitted: August 31, 2007
- Operation: Air carrier
- Aircraft: N521UP
- Make and model: Boeing 747 212B
- Registry model: [Boeing 747 212B](https://openairdocs.org/model/boeing-747-212b) (OpenAirDocs)
- Aircraft serial: 21944
- Aircraft time: 79,715 hours, 18,925 cycles
- System (JASC): [5411 · Nacelle/Pylon, Frame/Spar/Rib](https://openairdocs.org/jasc/5411)
- Part: Rib
- Condition: Cracked
- Location: Nr 1 Pylon
- 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/UPS07450563

## Discrepancy

INSPECTION TYPE:C NR 1 PYLON DRY BAY UPPER LINK STRUT BEAM O/B SIDE ATTACHMENT RIB ANGLE FOUND CRACKED AS MARKED NAC STA 223 (AFT SIDE) , CRACK LENGTH 5/8" APPROX NR 1 PYLON DRY BAY UPPER LINK STRUT BEAM O/B SIDE ATTACHMENT RIB ANGLE REPAIRED AS PER HX RS NR R54-51-35856 AND UPS EO NR B747-5410-27512, DETAIL REPEAT INSPECTION OF THE SUBJECT REPAIRED AREA IS REQ. AT EVERY 'C' CHK OR 18 MONTHS PER HX RS NR R54-51-35856 AND UPS EO NR B747-5410-27512.

---
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.