# SDR 0100856716

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 9, 2001
- Submitted: March 13, 2001
- Operation: Air carrier
- Aircraft: N616US
- Make and model: Boeing 747251F
- Aircraft serial: 21120
- Aircraft time: 83,738 hours, 21,351 cycles
- System (JASC): [5314 · Fuselage Main, Keel](https://openairdocs.org/jasc/5314)
- Part: Keelbeam
- 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/0100856716

## Discrepancy

DURING M-CHECK, FOUND CORROSION ON UPPER SURFACE OF KEEL BEAM LOWER STRUCTURE, STATION 1310 TO 1329.  REPAIRED PER EA 67-165004.

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