Service difficulty report · Connector · Lear 35LEAR

Difficulty date
January 30, 2001
Submitted
March 21, 2002
Operation
General aviation
Make and model
Lear 35LEAR
Aircraft time
14,628 hours
Engine
Garrtt TFE73122B
Part
Connector
Condition
Damaged
Location
Anti-Skid System
Stage of operation
LD
How discovered
O
Nature of condition
H
Precautionary procedure
K

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

What was found

(CAN) ON A BASE INSPECTION IT WAS NOTED THAT THE NR 1 AND NR 2 TIRES HAD FLAT SPOTS FROM SKIDDING. THERE WAS NO REPORTED ANTI-SKID FAILURE LIGHT ILLUMINATION. INVESTIGATION REVEALED THAT THE LT ANTI-SKID CONTROL VALVE WAS NOT RELEASING THE PRESSURE TO THE SKIDDING WHEEL. CONNECTOR PIN "G" ON THE CONTROL VALVE WAS FOUND TO HAVE CORRODED TO THE POINT THAT IT BROKEN OFF INSIDE THE CONNECTOR PLUG. THIS CIRCUIT CONTROLS THE RETURN SHUT-OFF SOLENOID IN THE VALVE. THE FAILURE LOGIC IN THE ANTI-SKID CONTROL BOX CHECKS THE OPERATION OF THE WHEEL TRANSDUCERS BUT DOES NOT INDICATE A FAILURE OF THE VALVE. THE CONTROL VALVE IS LOCATED IN THE WHEEL WELL WHERE IT IS SUBJECT TO WATER CONTAMINATION.