SDR AALA202508053631

Service difficulty report · Spring · Boeing 737823

Difficulty date: July 16, 2025
Submitted: August 5, 2025
Operation: Air carrier
Aircraft: N998NN
Make and model: Boeing 737823
Aircraft serial: 31250
Aircraft time: 25,755 hours, 11,068 cycles
System (JASC): 5520 · Elevator Structure
Part: Spring
Condition: Corroded
Location: Zone 300 Elev
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 HORIZONTAL STABILIZER ELEVATOR TAB CONTROL MECHANISM SPRINGS LOWER HARDWARE HAS EVIDENCE OF SURFACE RUST. REMOVED AND REPLACED LEFT HORIZONTAL STABILIZER ELEVATOR TAB CONTROL MECHANISM SPRINGS LOWER HARDWARE AND PERFORMED SATISFACTORYELEVATOR AND ELEVATOR TRIM CONTROL SYSTEM TEST AND ELEVATOR TABCONTROL SYSTEM OPERATIONAL TEST. PER B737-NG AMM 27-31-00, B737-NG AMM 27-31-34.