# SDR DALA1219476302

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 24, 2012
- Submitted: March 29, 2012
- Operation: Air carrier
- Aircraft: N662US
- Make and model: Boeing 747451
- Aircraft serial: 23720
- Aircraft time: 94,889 hours, 12,121 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Sill
- 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/DALA1219476302

## Discrepancy

DURING HCK, CORROSION WAS NOTED ON THE LT UPPER DECK EMERGENCY EXIT DOOR SILL, STA 685, STR 13L.  ER/A 500558-14 SECTION I WAS COMPLETED AT THAT TIME.  FOLLOW ON ACTION IS REQUIRED FOR THIRD STAGE APPROVAL.

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