SANTA ANA, CA, USA
N88MJ
CESSNA 550
AFTER COMPLETING A DUAL INSTRUCTIONAL FLT IN 91 TO 103 DEG WX, THE ACFT LANDED UNEVENTFULLY. THE PIC FAILED TO FOLLOW THE REQUIRED PROCEDURE IN THE FLIGHT MANUAL OF TURNING OFF THE ANTI-SKID SWITCH AFTER CLEARING THE RWY. RATHER, HE USED THE OUTDATED PROCEDURE IN AN OLD CHECKLIST CARD & LEFT THE ANTI-SKID SWITCH ON. AS THE PIC PARKED THE ACFT THE ANTI-SKID CONTROL UNIT MALFUNCTIONED & RELEASED BRAKE PRESSURE. BY THE TIME THE PIC REGAINED CONTROL BY ACTIVATING THE EMERGENCY PNEUMATIC BRAKE SYSTEM, THE ACFT HAD COLLIDED WITH A CESSNA 500 & AN AERO COMMANDER 500S. TWO YEARS EARLIER A SERVICE LETTER HAD BEEN ISSUED STATING THAT THE ANTI-SKID CONTROL UNIT COULD MALFUNCTION AT TEMPS OVER 100 DEG F. THE OPERATOR HAD FAILED TO COMPLY WITH THE SL & HAD NOT SUBMITTED THE UNIT FOR MODIFICATION. WITHIN THE PAST MONTH THE PIC & THE COMPANY CHIEF PLT HAD OBTAINED TYPE RATINGS IN THE ACFT FROM A DESIGNATED PLT EXAMINER.
Source: NTSB Aviation Accident Database
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