# SDR KCSA111135

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 24, 2011
- Submitted: May 26, 2011
- Operation: Air carrier
- Aircraft: [N793CK](https://openairdocs.org/aircraft/N793CK), registered now
- Make and model: Boeing 747222B
- Aircraft serial: 23736
- Aircraft time: 73,616 hours, 9,463 cycles
- System (JASC): [5412 · Nacelle/Pylon, Bulkhead/Firewall](https://openairdocs.org/jasc/5412)
- Part: Firewall
- Condition: Chafed
- Location: Nr 4 Pylon
- 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/KCSA111135

## Discrepancy

NR 4 PYLON, INBOARD FIREWALL CHAFED DOUBLE ON INNER SKIN, WORN THROUGH IN AREAS, NAC STA 221-190.

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