# SDR 2026FA0000296

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 24, 2026
- Submitted: April 24, 2026
- Operation: General aviation
- Aircraft: N402SV
- Make and model: Aerosp ATR-42
- Registry model: [Aerosp ATR-42](https://openairdocs.org/model/aerospatiale-atr-atr-42) (OpenAirDocs)
- Aircraft serial: 1217
- System (JASC): [5753 · Trailing Edge Flaps](https://openairdocs.org/jasc/5753)
- Part: Panel
- Part number: S5751051301800
- Condition: Damaged
- Location: Zone 500
- Stage of operation: NR
- How discovered: 9
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026FA0000296

## Discrepancy

LH WING OUTBOARD FLAP TRAILING EDGE PANEL (P/N 532BB) WAS DAMAGED DUE TO A MISMATCH BETWEEN THE FLAP POSITION AND THE FLAP LEVER POSITION. THE INCIDENT OCCURRED DURING A LANDING GEAR SWING AND ADJUSTMENT OF THE NOSE LANDING GEAR (NLG) DOORS.  DURING THIS ACTIVITY, THE FLAPS WERE UNINTENTIONALLY COMMANDED TOWARD THE 0 POSITION.  THIS OCCURRED WHILE THE CROSSFEED VALVE WAS OPEN AND THE AUXILIARY PUMP WAS USED TO PRESSURIZE THE GREEN HYDRAULIC SYSTEM.  AS A RESULT, THE FLAPS MOVED TO THE 0 POSITION WHILE SEVERAL FLAP CAM GUIDES HAD NOT YET BEEN INSTALLED, LEADING TO DAMAGE TO THE FLAP TRAILING EDGE PANEL.

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