Service difficulty report · Actuator · Boeing 737222

Difficulty date
July 6, 1997
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N9032U
Make and model
Boeing 737222
Aircraft serial
19070
Engine
Pwa JT8D7B
Part
Actuator
Part number
6544910
Condition
Cracked
Location
Lt Mlg
Stage of operation
IN
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

LT MLG ACTUATOR OUTBOARD ATTACH LUG (HEAD END) WAS FOUND BROKEN IN HALF. THE HALF THAT WAS BROKEN OFF WAS FOUND IN TWO SEPARATE PIECES NEAR THE TRAILING EDGE PANEL. THE ACTUATOR WAS RETAINED IN POSITION BY THE GEOMETRY OF THE ACTUATOR BEAM ASSEMBLY. NO LANDING GEAR OPERATIONAL IRREGULARITIES PREVIOUSLY REPORTED. *S/D* REPLACED ACTUATOR. FRACTURE MODE AND LOCATION WAS FOUND TO BE OF SIMILAR NATURE TO ANOTHER ACTUATOR THAT HAD FRACTURED DUE TO STRESS CORROSION CRACKING. REMOVED ACTUATOR SCHEDULED FOR ADDITIONAL FAILURE ANALYSIS.