SDR 96ZZZX965

Service difficulty report · Uplock System · Cessna 525

Difficulty date: February 20, 1996
Submitted: March 26, 2000
Operation: General aviation
Aircraft: N70KW
Make and model: Cessna 525
Aircraft serial: 5250050
System (JASC): 3230 · Landing Gear Retraction/Extension System
Part: Uplock System
Condition: Malfunctioned
Location: Mlg
Stage of operation: CR
Nature of condition: J
Precautionary procedure: O

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

What was found

BOTH MAIN LANDING GEAR DROPPED FROM THE WHEELWELLS AT FL 350 WITH THE GEAR UNLOCK LIGHT AND HYDRAULIC PRESSURE ON LIGHT ILLUMINATED. CHECKED ALL LANDING GEAR WIRING AND SWITCHES. REPLACED THE LANDING GEAR CONTROL VALVE AND HYDRAULIC PRESSURE RELIEF VALVE. PERFORMED A SATISFACTORY OPERATIONAL CHECK OF THE LANDING GEAR SYSTEM. AIRCRAFT TOTAL TIME, 440.9 HOURS AND 365 LANDINGS.

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