SDR K11A2024071600269

Service difficulty report · Flap System · Boeing 737436

Difficulty date: July 16, 2024
Submitted: July 22, 2024
Operation: Air carrier
Aircraft: N734CK
Make and model: Boeing 737436
Aircraft serial: 25858
Aircraft time: 55,180 hours, 37,201 cycles
System (JASC): 2780 · Leading Edge Slat Control System
Part: Flap System
Condition: Faulted
Stage of operation: AP
How discovered: V
Nature of condition: F
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

PROBLEM DESCRIPTION: TRAILING EDGE FLAP ASYMMETRY LEFT FLAP INDICATE UP & RIGHT FLAP INDICATES L1, SLATS DID NOT EXTEND WHEN FLAP HANDLE WAS MOVED TO #1 DETENT. CORRECTIVE ACTION & OTHER PERTINENT INFORMATION: FOUND #3 FLAP TRANSMISSION TORQUE TUBE COUPLING DISENGAGED. INSPECTED TORQUE TUBE IAW B737 AMM 27-51-00. RE-ENGAGED AND SECURED TORQUE TUBE COUPLING IAW B737 AMM 27-57-64, PERFORMED OPS CHECK OF TRAILING EDGE FLAP SYSTEM IAW B737 AMM 27-51-00 OPS CHECK GOOD.