# SDR ASAA2020091933197

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 19, 2020
- Submitted: September 21, 2020
- Operation: Air carrier
- Aircraft: [N251AK](https://openairdocs.org/aircraft/N251AK), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 62470
- Aircraft time: 15,535 hours, 5,138 cycles
- System (JASC): [5610 · Flight Compartment Windows](https://openairdocs.org/jasc/5610)
- Part: Bolt
- Part number: UNKNOWN
- Condition: Loose
- Location: Sliding Window
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020091933197

## Discrepancy

THE COPILOT WINDOW IS VERY DIFFICULT TO OPEN AND CLOSE.  FEELS LIKE SOMETHING IS BINDING IN THE TRACK.  GROUNDED-YES.  FOUND FWD LOWER SPECIAL BOLT BACKING OFF.  RETIGHTENED LOWER SPECIAL BOLT, REF APPLICABLE STEPS OF B737-900 AMM TASK 56-12-11-820-80.  NO ADJUSTMENTS NECESSARY.  OPS TEST OF WINDOW HEAT GOOD.

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