# SDR UIEA2011092900530

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 28, 2011
- Submitted: September 29, 2011
- Operation: Air carrier
- Aircraft: [N492MC](https://openairdocs.org/aircraft/N492MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 29253
- Aircraft time: 56,301 hours, 10,049 cycles
- System (JASC): [7810 · Engine Collector/Tailpipe/Nozzle](https://openairdocs.org/jasc/7810)
- Part: Sleeve
- Condition: Cracked
- Location: Exhaust Nozzle
- 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/UIEA2011092900530

## Discrepancy

DURING MX WALKAROUND, FOUND A CRACK ON THE EXHAUST NOZZLE OUTER SLEEVE, BETWEEN APPROX THE 9 TO 10 O'CLOCK POSITION ON THE NR 2 ENGINE. THE CIRCUMFERENTIAL CRACK IS APPROX 12" LONG . IAW SRM 54-41-30 THE LENGTH OF THE CRACK IS OUT OF LIMITS.   STOP DRILLED ENDS OF CRACK WITH A 0.125" DIAMETER HOLE.

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