SDR 97ZZZX3384

Service difficulty report · O-Ring · Cessna 421B

Difficulty date: June 30, 1997
Submitted: March 26, 2000
Operation: General aviation
Aircraft: N41019
Make and model: Cessna 421B
Aircraft serial: 421B0401
System (JASC): 3243 · Master Cylinder/Brake Valve
Part: O-Ring
Part number: MS2877132
Condition: Worn
Location: Lt Brake
Component: Parkerhanfin · 30100
Stage of operation: TX
Nature of condition: K
Precautionary procedure: O

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

What was found

LEFT BRAKE INOPERABLE CAUSING PILOT TO LOSE CONTROL AND STRIKE ANOTHER AIRCRAFT. INVESTIGATION FOUND NO FLUID IN BRAKE, CAUSED BY O-RINGS BEING OLD, WORN, AND HARD AND LEAKING. REPLACED O-RINGS AND SERVICED BRAKE SYSTEM. OPERATION WAS NORMAL.

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