# SDR CALA2015040793507

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 3, 2015
- Submitted: April 7, 2015
- Operation: Air carrier
- Aircraft: N199UA
- Make and model: Boeing 747422
- Aircraft serial: 28717
- Aircraft time: 70,838 hours, 8,112 cycles
- Engine: Pwa PW4056
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Intercostal
- Condition: Corroded
- 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/CALA2015040793507

## Discrepancy

MAIN DECK STATION 1770 - 1880, RBL40 FLOOR STRUCTURE SURFACE FOUND CORROSION AFT FLOOR.  FABRICATED & INSTALLED NEW INTERCOSTAL IAW DWG 140U5617, DWG 146U5611 & SRM 51-40- 01.

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