# SDR CALA2026042815790

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 27, 2026
- Submitted: April 28, 2026
- Operation: Air carrier
- Aircraft: [N17331](https://openairdocs.org/aircraft/N17331), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 67589
- Aircraft time: 8,178 hours, 2,774 cycles
- System (JASC): [3213 · Main Landing Gear Strut/Axle/Truck](https://openairdocs.org/jasc/3213)
- Part: Axle
- Part number: 161A1130301
- Part serial: 838
- Condition: Failed
- Location: Zone 700
- Part time: 8,178 hours, 2,774 cycles
- Stage of operation: LD
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026042815790

## Discrepancy

BRAKES APPEAR TO BE TO BE LOCKING UPON TOUCHDOWN & EXIT FROM R WY GRABING...UPON TAXI INTO RAMP, ACFT EXPERIENCED NR 4 MAIN TIRE DEFLATION. NR 4 BRAKE FOUND DISINTEGRATED. HUB CAP WAS FOUND ON A TAXIWAY PARTIALLY SHAVED OFF & ALSO DISINTEGRATED. ACFT TOWED TO THE GATE . CLEANED UP TRAIL OF METAL DEBRIS FROM BRAKE. UNABLE TO REMOVE NR 4 BRAKE - WHEEL DUE TO LOCK NUT SHIFTING OFF THREADS ALONG WITH OTHER SEVERE DAMAGE.  REPLACED NR 3 MAIN. FOUND WHEEL ASSY AND BRAKE ASSY WITH MELTED MATERIAL. RECOMMEND PULLING AXLE WITH NR 4 WHEEL & BRAKE ATTACHED. COMPLETED PARTIAL REMOVAL OF RT GEAR AXLE IAW AMM 32-11-85-000-801, UP TO & INCLUDING E. (7).   COMPLETED REMOVAL OF RT MLG AXLE WITH WHEEL & BRAKE ATTACHED DUE TO DAMAGE IAW AMM 32-11-85-000-801. RT MLG REQ HIGH ENERGY STOP INSPECTION IAW AMM TASK 05-51-07-210-801 OTHER REQ INSPECTION ARE THE FOLLOWING BRAKE SEIZURE CONDITIONAL INSPECTION IAW AMM 05-51-15-210-801, HEAT DAMAGE INSPECTION OF AXLE IAW AMM TASK 05-51-17-210-802, WHEEL BEARING FAILURE IAW AMM 05-51-17-210-801 AND TIRE TREAD LOSS OR TIRE BURST CONDITIONAL INSPECTION IAW AMM  05-51-54-210-801 COMPLETED WHEEL BEARING FAILURE IAW AMM 05-51-17-210-801. NO DAMAGE OR OVERHEAT SIGNS FOUND ON MLG STRUT ITSELF. AXLE, WHEEL & BRAKE ASSEMBLY REQ REPLACEMENT DUE TO BEING STUCK TOGETHER.

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