# SDR AALA202001239015

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 17, 2020
- Submitted: January 23, 2020
- Operation: Air carrier
- Aircraft: N177AN
- Make and model: Boeing 757223
- Aircraft serial: 32396
- Aircraft time: 58,822 hours, 16,333 cycles
- System (JASC): [5420 · Nacelle/Pylon Miscellaneous Structure](https://openairdocs.org/jasc/5420)
- Part: Stiffener
- Part number: 311N504017
- Condition: Cracked
- Location: Lt Nacelle
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202001239015

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: LEFT HAND PYLON INTERIOR UPPER SPAR STIFFENER CRACKED AT PYLON STATION 153.90 AND NACELLE BL 0. REPAIRED SPAR STIFFENER PER EA 301259.

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