# SDR CALA2026040115012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 29, 2026
- Submitted: April 1, 2026
- Operation: Air carrier
- Aircraft: [N69847](https://openairdocs.org/aircraft/N69847), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 42187
- Aircraft time: 34,879 hours, 12,652 cycles
- System (JASC): [7830 · Engine Thrust Reverser](https://openairdocs.org/jasc/7830)
- Part: Module
- Part number: 3810056108
- Part serial: 4206A
- Condition: Faulted
- Location: Thrust Reversers
- Part time: 79,415 hours, 32,073 cycles
- Stage of operation: TO
- How discovered: O
- Nature of condition: O
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026040115012

## Discrepancy

LEFT THRUST REV UNLOCK AT 99 KTS.   AFTER CONF WITH FODM CREW REPORTED 120KT RTO. CYCLED E1 T/R, OPS CHECKS GOOD, NO CURRENT FAULTS.  REMOVED MODULE ASSY VALVE AND R & R 2 UNIONS AND PACKING. RESTRICTOR CK VALVE WAS STUCK ON OLD VALVE.  LEFT OTBD SLEEVE STOWED SENSOR ROLLER FOUND WITH MULTIPLE FLAT SPOTS AND REDUCED DIAMETER WHICH ALLOWS STOWED - UNSTOWED TARGET TO APPROACH PROXIMITY SENSOR S831. REMOVED AND REPLACED LEFT T/R CONTROL VALVE MODULE, IAW AMM 78-34-01, OPS & LEAK CHKD GOOD, ALL FLT DECK INDICATIONS NORMAL AND NO FAULTS ON EAU.

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