# SDR R61A201511270905

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 27, 2015
- Submitted: December 13, 2015
- Operation: Air carrier
- Aircraft: [N104HQ](https://openairdocs.org/aircraft/N104HQ), registered now
- 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: 17000160
- Aircraft time: 23,648 hours, 18,368 cycles
- System (JASC): [4910 · APU Cowling/Containment](https://openairdocs.org/jasc/4910)
- Part: Firewall
- Condition: Cracked
- Location: Apu Bay
- 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/R61A201511270905

## Discrepancy

DURING HEAVY CHECK, APU FIREWALL 351AZ CRACKED AT TOP AND BOTTOM OF L ANGLE.  MAINTENANCE BLENDED OUT CRACKS IN APU FIREWALL, 351AZ CRACKED AT TOP AND BOTTOM IAW SRM 53-31-21.

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