SDR 95ZZZX1846

Service difficulty report · Valve Body · Boeing 737*

Difficulty date: March 31, 1995
Submitted: March 26, 2000
Operation: General aviation
Make and model: Boeing 737*
System (JASC): 3230 · Landing Gear Retraction/Extension System
Part: Valve Body
Part number: 410SE1
Condition: Corroded
Location: Actuator
Component: 4105DA
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

PITTING CORROSION DISCOVERED ON OUTSIDE HOUSING DUE TO BREAK-DOWN OF ANODIZING. MANUFACTURER RECOMMENDED BLENDING AND CHEM FILM PROTECTION PRIOR TO ANTI-CORROSION PROTECTION. MANUFACTURER BELIEVES OUTSIDE CONTAMINATION AROUND PART TO ATTACH SURFACE ON AIRFRAME WAS CAUSE OF ANODIZE BREAK-DOWN. PART IS SERVICEABLE EXCEPT FOR OUTSIDE COSMETIC DAMAGE.