# SDR EIAA2011010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 9, 2011
- Submitted: February 10, 2011
- Operation: Air carrier
- Aircraft: [N471EV](https://openairdocs.org/aircraft/N471EV), registered now
- Make and model: Boeing 747273C
- Aircraft serial: 20651
- Aircraft time: 104,941 hours, 24,717 cycles
- System (JASC): [5411 · Nacelle/Pylon, Frame/Spar/Rib](https://openairdocs.org/jasc/5411)
- Part: Frame
- Condition: Cracked
- Location: Nr 3 Pylon
- 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/EIAA2011010

## Discrepancy

NR 3 PYLON REAR ENGINE MOUNT BULKHEAD HAS ALL 4 FRAMES CRACK DAMAGE BEYOND LIMITS OF S/B 747-54A2202 FIG 12.  REPLACED ALL 4 FRAMES PER B747 SRM 51-30-05 PG 6-9 AND 51-30-02 PG 8-9 ITEM 7D AND SB 747-54A2202 FIG 12.

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