# SDR SWAA2026070617022

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 29, 2026
- Submitted: July 6, 2026
- Operation: Air carrier
- Aircraft: [N221WN](https://openairdocs.org/aircraft/N221WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 34259
- Aircraft time: 68,682 hours, 40,963 cycles
- System (JASC): [2750 · Trailing Edge Flap Control System](https://openairdocs.org/jasc/2750)
- Part: Flap System
- Condition: Locked
- Stage of operation: AP
- How discovered: O
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2026070617022

## Discrepancy

TRAILING EDGE FLAP ASSYMETRY ON FLAP EXTENSION. RAN QRA FOR FLAP ASSYMETRY. ZERO FLAP LANDING. ALT FLAP USED FOR LEADING EDGE. AUTO BRAKE 3 USED. BRAKE COOLING 27.1 MILLION FT/LBS.  UPON INVESTIGATION FOUND THAT HIGH ENERGY STOP WITH BRAKE COOLING OF 27.1 MILLION FT POUNDS TO BE WITHIN TIMED COOLDOWN PERIOD PER AMM 05-51-07-210-801 FIGURE 201 ACFT OK TO RETURN TO SERVICE.  VERIFIED UPON INVESTIGATION FOUND THAT HIGH ENERGY STOP WITH BRAKE COOLING OF 27.1 MILLION FT POUNDS TO BE WITHIN TIMED COOLDOWN PERIOD IAW AMM 05-51-07-210-801 FIGURE 201 ACFT OK TO RETURN TO SERVICE.

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