# SDR 99ZZZX648

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 1, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N409ES](https://openairdocs.org/aircraft/N409ES), registered now
- Make and model: Cessna 172R
- Registry model: [Cessna 172R](https://openairdocs.org/model/cessna-172r) (OpenAirDocs)
- Aircraft serial: 17280231
- Propeller: Mcauly IC235LFA7570
- System (JASC): [5412 · Nacelle/Pylon, Bulkhead/Firewall](https://openairdocs.org/jasc/5412)
- Part: Firewall
- Part number: 05530313
- Condition: Wrinkled
- Location: Cowl Mount
- 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/99ZZZX648

## Discrepancy

FOUND FIREWALL SEVERELY WRINKLED, NOSE ATTACH STRUCTURE RIVETS SHEARED.  TWO INCH CRACK IN FIREWALL BELOW BATTERY BOX AT COWL MOUNT.  SUBMITTER STATED A POSSIBLE CAUSE AS HARD LANDING.  THICKER FIREWALL COULD PREVENT RECURRENCE.

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