SDR AALA202510309904

Service difficulty report · Tab · Boeing 737823

Difficulty date: October 12, 2025
Submitted: October 30, 2025
Operation: Air carrier
Aircraft: N904AN
Make and model: Boeing 737823
Aircraft serial: 29506
Aircraft time: 69,500 hours, 29,037 cycles
System (JASC): 5523 · Elevator, Tab Structure
Part: Tab
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: RIGHT ELEVATOR TAB CONTROL MECHANISM SPRING SUPPORT BUSHINGS SHOW SIGNS OF CORROSION. REMOVED AND INSTALLED NEW BUSHINGS ON THE RIGHT HAND ELEVATOR TAB CONTROL MECHANISMS. PER B737NG AMM 27-31-34 AND PERFORMED SATISFACTORYELEVATOR TAB CONTROL SYSTEM OPERATIONAL TEST. PER B747NG AMM 27-31-00700-815 AND PERFORMED SATISFACTORY ELEVATOR AND ELEVATOR TRIM CONTROL SYSTEM OPERATIONAL TEST. PER B737NG AMM 27-31-00710-801.