# SDR 121JW

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 22, 2004
- Submitted: June 30, 2004
- Operation: General aviation
- Aircraft: [N121JW](https://openairdocs.org/aircraft/N121JW), registered now
- Make and model: Gulstm 690A
- Aircraft serial: 11299
- Aircraft time: 5,674 hours
- System (JASC): [5412 · Nacelle/Pylon, Bulkhead/Firewall](https://openairdocs.org/jasc/5412)
- Part: Firewall
- Part number: 6600011112
- Condition: Cracked
- Location: Zone 400
- Part time: 5,674 hours
- 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/121JW

## Discrepancy

THE LT AND RT ENGINE ALUMINUM FIREWALLS (P/N 660001-11 / -12 CHANNEL) HAVE DEVELOPED VERTICAL CRACK INDICATIONS AT THE LOWER SHEAR CLIP ATTACHMENT TAB.  BOTH THE LT AND RT ENGINE IB LOWER TABS ARE COMPLETELY SHEARED AT THE FLANGE RADIUS.

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