# SDR WRLA97129

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 25, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N9MMAZ
- Make and model: Doug DC-10-30
- Registry model: [Doug DC-10-30](https://openairdocs.org/model/mcdonnell-douglas-dc-10-30) (OpenAirDocs)
- Aircraft serial: 46933
- System (JASC): [5412 · Nacelle/Pylon, Bulkhead/Firewall](https://openairdocs.org/jasc/5412)
- Part: Firewall
- Part number: AUB7003503
- Condition: Corroded
- Location: Nr 3 Engine
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/WRLA97129

## Discrepancy

DURING SCHEDULED MAINTENANCE (B-CHECK), MAINTENANCE CONTRACTOR IDENTIFIED CORROSION ON THE NR 3 ENGINE PYLON, LOWER FIREWALL, AT STA YN 233 TO YN 286.  MAINTENANCE CONTRACTOR REMOVED CORROSION AND TREATED SURFACES PER REO-03778 AND SB 54-57.  (X)

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