# SDR FDEA201109224038

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 22, 2011
- Submitted: October 4, 2011
- Operation: Air carrier
- Aircraft: [N643FE](https://openairdocs.org/aircraft/N643FE), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48486
- Aircraft time: 48,609 hours, 9,839 cycles
- System (JASC): [5313 · Fuselage Main, Longeron/Stringer](https://openairdocs.org/jasc/5313)
- Part: Longeron
- Part number: AGA31861
- Condition: Corroded
- Location: Zone 100
- 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/FDEA201109224038

## Discrepancy

STA 1079 TO 1099 LONGERON 45R SURFACE CORROSION FOUND EXEEDED LIMITS.  CORROSION ON LONGERON REMOVED AS PER SRM 51-21-01 REV 47.    MATERIAL MEASURED THICKNESS 0.096 INCH; MATERIAL REMOVED = 0.040 INCH; MATERIAL   REMAINED =  0.056 INCH.  FOUND EXCEEDED LIMIT PER SRM 53-00-00 REV 47, FIGURE 205.   REMOVED AND REPLACED LONGERON AS PER SRM 51-31-01 REV 47.    REPAIR CLASSIFIED AS MAJOR PER GMM 6-2-100 REV 112.

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