# SDR C77A20120426020

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 22, 2012
- Submitted: April 26, 2012
- Operation: Air carrier
- Aircraft: N624CZ
- Make and model: Emb ERJ 170-200 LR
- Registry model: [EMB ERJ 170-200 LR](https://openairdocs.org/model/embraer-s-a-erj-170-200-lr) (OpenAirDocs)
- Aircraft serial: 17000222
- Aircraft time: 10,720 hours, 6,216 cycles
- System (JASC): [4910 · APU Cowling/Containment](https://openairdocs.org/jasc/4910)
- Part: Firewall
- Part number: 17065669003
- Condition: Cracked
- Location: Zone 300
- Part time: 10,720 hours, 6,216 cycles
- 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/C77A20120426020

## Discrepancy

APU FIREWALL PANEL 351BZ, PN 170-65669-003 HAS 0.500" CRACK AT UPPER ANGLE AND 0.480" CRACK AT LOWER ANGLE.  CRACK ROUTED OUT AND NDT PERFORMED VERIFYING NO MORE CRACKING EXISTS ON WO 482000-316 IAW ETD2012-170-005581 AND COMPASS EA E175-53-263 REV IR.

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