# SDR DALA2026042302615

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 22, 2026
- Submitted: April 23, 2026
- Operation: Air carrier
- Aircraft: [N544US](https://openairdocs.org/aircraft/N544US), registered now
- Make and model: Boeing 757251
- Aircraft serial: 26491
- Aircraft time: 90,907 hours, 30,186 cycles
- System (JASC): [2560 · Emergency Equipment](https://openairdocs.org/jasc/2560)
- Part: Indicator
- Condition: Inoperative
- Location: Zone 800
- 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/DALA2026042302615

## Discrepancy

R2 KNUCKLE KNOCKER INOP.   CLEANED AND REMOVED DEBRIS FROM 2R KNUCKLE KNOCKER. CYCLED ARMED LEVER SWITCH MULTIPLE TIMES. KNUCKLE KNOCKER OPS NORMAL IAW B757 AMM 25-66. (1557964) AIRCRAFT IS GROUNDED

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