# SDR UPS07450529

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 7, 2007
- Submitted: August 29, 2007
- 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: 79,715 hours, 18,925 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Doubler
- Condition: Cracked
- Location: Fuselage
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS07450529

## Discrepancy

INSPECTION TYPE:C M/D LEFT BS 820 TENSION TIE TO FRAME CONNECTION FOUND NR 12 HOLE CRACK AT FRAME WEB DOUBLER.  M/D LEFT BS 820 TENSION TIE TO FRAME ATTACH DOUBLER AT HOLE NR 12 OVERSIZED IN STACK UP TO 0.247 INCH DIA BY INCREMENT AS PER EO B747-5310-23715 APP D.  FASTENER INSTALLED AS PER EO B747-5310-23715 APP C, AFTER HFEC INSPECTED PER NTM PART 6 51-00-00 FIG 16.

---
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.