# SDR DALA2026010500058

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 2, 2026
- Submitted: January 5, 2026
- Operation: Air carrier
- Aircraft: [N555NW](https://openairdocs.org/aircraft/N555NW), registered now
- Make and model: Boeing 757251
- Aircraft serial: 33391
- Aircraft time: 63,261 hours, 28,684 cycles
- System (JASC): [5410 · Nacelle/Pylon, Main Frame](https://openairdocs.org/jasc/5410)
- Part: Shim
- Condition: Migrated
- Location: Zone 400
- 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/DALA2026010500058

## Discrepancy

SHIM MIGRATION INSIDE NR 1 PYLON SEEN THROUGH ACCESS PANEL 434AL AT LOWER INTERNAL BULKHEAD TO ENGINE MOUNT SURFACES BELOW BARREL NUTS AT I/B AND O/B SIDES.   FABRICATED AND INSTALLED NEW SHIMS AT 191.861 BULKHEAD LOWER SURFACE IAW DWG 311N3160-6,  SRM 51-40-02, SRM 51 -40-04, & ERA 630819-14 REV WO O PRI REV 1. (1381779)

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