# SDR UIEA2011063000357

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 30, 2011
- Submitted: July 11, 2011
- Operation: Air carrier
- Aircraft: [N517MC](https://openairdocs.org/aircraft/N517MC), registered now
- Make and model: Boeing 747243B
- Aircraft serial: 23300
- Aircraft time: 91,897 hours, 15,722 cycles
- System (JASC): [5412 · Nacelle/Pylon, Bulkhead/Firewall](https://openairdocs.org/jasc/5412)
- Part: Bulkhead
- Condition: Cracked
- Location: Nr 4 Nacelle
- 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/UIEA2011063000357

## Discrepancy

NR 4 PYLON AFT SIDE OF REAR ENG MOUNT BULKHEAD WAS FOUND 1 EA SCREW HOLE CRACKED ON 1 O/C AND 2 O/C POS APPROX .1250" AND .2500" LENGTH.  (NR4 PYLON AFT SIDE OF REAR ENG MOUNT BULKHEAD LT FRAME WEB REPLACE ACCOMPLISHED AS EPR RS 54-53-37139, REV A.)

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