# SDR NWAA072036739

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 11, 2007
- Submitted: May 30, 2007
- Operation: Air carrier
- Aircraft: N639US
- Make and model: Boeing 747251F
- Aircraft serial: 23887
- Aircraft time: 73,897 hours, 16,043 cycles
- System (JASC): [5322 · Fuselage Internal Mounting Structure](https://openairdocs.org/jasc/5322)
- Part: Tension Tie
- Condition: Cracked
- Location: Bs 860
- 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/NWAA072036739

## Discrepancy

DURING "M" CHECK, FOUND CRACKS IN BS 860 TENSION TIE RT CHANNEL NR 5 AND NR 15 FASTENER HOLES AND ONE FASTENER HOLE OF THE WEB DOUBLER.  REPAIRED PER EA 67-209242 SECT I SECTION II INSPECTION TO BE ACCOMPLISHED AT 3000 CYCLE INTERVALS.

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