# SDR UIEA2011073100388

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 31, 2011
- Submitted: August 2, 2011
- Operation: Air carrier
- Aircraft: N523MC
- Make and model: Boeing 747-2D7B
- Registry model: [Boeing 747-2D7B](https://openairdocs.org/model/boeing-747-2d7b) (OpenAirDocs)
- Aircraft serial: 21782
- Aircraft time: 104,499 hours, 21,329 cycles
- System (JASC): [7800 · Engine Exhaust System](https://openairdocs.org/jasc/7800)
- Part: Structure
- Condition: Cracked
- Location: Thrust Reverser
- 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/UIEA2011073100388

## Discrepancy

DURING WALK AROUND CHECK, MX FOUND 2EA CRACKS AT 7 O'CLOCK POSITION ON THE AFT CENTER BODY ON THE NR 2 ENGINE.  1EA CRACK MEASURING 1.25 INCHES AND 1EA CRACK MEASURING APPROX 1 INCH REF FIGURE 1.  DISPOSITION WAS MADE TO STOP DRILL THE CRACKS USING STANDARD PRACTICES AND ELEMENTARY OPERATIONS; RE-INSPECT EVERY FLIGHT CYCLE; AND REPLACE CENTERBODY WITHIN 10 FLIGHT CYCLES. THIS EO IS APPROVED BY 8110-3 DATED JULY 31, 2011.

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