# SDR DXTA2016040806229

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 8, 2016
- Submitted: April 25, 2016
- Operation: Air carrier
- Aircraft: [N956QS](https://openairdocs.org/aircraft/N956QS), registered now
- Make and model: Cessna 750
- Registry model: [Cessna 750](https://openairdocs.org/model/cessna-750) (OpenAirDocs)
- Aircraft serial: 7500156
- Aircraft time: 14,142 hours, 8,726 cycles
- System (JASC): [5312 · Fuselage Main, Bulkhead](https://openairdocs.org/jasc/5312)
- Part: Firewall
- Condition: Cracked
- Location: Fuselage
- 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/DXTA2016040806229

## Discrepancy

APU FIREWALL CRACKED UNDER LT UPPER TRUSS MOUNT ATA 51.  REPAIRED IAW REPAIR DEFINITION S-750-0156 23PRD & SRM 51-40-03.  DOUBLER & 6712625-15-2 FILLER WAS FABRICATED.  MATCH DRILL 1 DOUBLER & 2 FILLER IAW DWG 6712625 & PRELIMINARY REPORT S-750-0156 23PRD.  INSTALL 1 DOUBLER & 2 FILLER WITH MS21070L08K, 12 EACH & MS20427M, 24EACH IAW SRM 51-40-03.  DOUBLER INSTALLED & FILLER INSTALL GOOD, FIREWALL INSTALLED & FASTENERS OVER SEALED.

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