# SDR DALA2026030401510

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 3, 2026
- Submitted: March 4, 2026
- Operation: Air carrier
- Aircraft: [N712TW](https://openairdocs.org/aircraft/N712TW), registered now
- Make and model: Boeing 757-2Q8
- Registry model: [Boeing 757-2Q8](https://openairdocs.org/model/boeing-757-2q8) (OpenAirDocs)
- Aircraft serial: 27624
- Aircraft time: 103,053 hours, 26,881 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/DALA2026030401510

## Discrepancy

4R DOOR KNUCKLE BUSTER NOT ARMING.   RESEATED KNUCKLE BUSTER & CLEANED DEBRIS OK FOR SVC 4R DOOR PER B757 AMM 52-11. (8584738)

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