SDR AALA202601220594

Service difficulty report · Spring · Boeing 737823

Difficulty date: December 30, 2025
Submitted: January 22, 2026
Operation: Air carrier
Aircraft: N867NN
Make and model: Boeing 737823
Aircraft serial: 40762
Aircraft time: 43,351 hours, 18,555 cycles
System (JASC): 5520 · Elevator Structure
Part: Spring
Condition: Corroded
Location: Zone 300
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

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

What was found

AIRCRAFT IN BASE MAINTENANCE: LEFT HAND ELEVATOR TAB CONTROL MECHANISM SPRINGS FORWARD ATTACHMENT SLEEVES SHOW SIGNS OF CORROSION. REMOVED AND REPLACED LEFT HAND ELEVATOR TAB CONTROL MECHANISM SPRING FORWARD ATTACHMENT SLEEVES. PER B737NG AMM 27-31-34. ACCOMPLISHED SATISFACTORY ELEVATOR AND ELEVATOR TRIM CONTROL SYSTEM OPERATIONAL TEST AND SATISFACTORY ELEVATOR TAB CONTROL SYSTEM OPERATIONAL TEST. PER B737NG AMM 27-31-00.