Service difficulty report · Pump · Cessna 560XL

Difficulty date
March 11, 2023
Submitted
March 13, 2023
Operation
Air carrier
Aircraft
N583QS
Make and model
Cessna 560XL
Aircraft serial
5605812
Aircraft time
12,603 hours, 9,603 cycles
Part
Pump
Part number
MP50B1
Part serial
5583
Condition
Defective
Location
Zone 100
Stage of operation
LD
How discovered
C
Nature of condition
O
Precautionary procedure
O

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

What was found

BRAKE PRESSURE LIGHT: DURING VISUAL APPROACH LOWERED LANDING GEAR FOLLOWED BY ANTISKID INOP LIGHT, AFTER NORMAL LANDING TAXING ONTO FBO RAMP LO BRK PRESS LIGHT ILLUMINATED FLASHING, USED EMER BRAKE PULL TO STOP AIRCRAFT SHORT OF PARKING. //SIGNOFF// ALLER ARRIVING ON SITE TECH PERFORMED AN INITIAL POWER UP AND NOTED THE BRAKE PRESS LOW, AND ANTI-SKID WARNING LIGHTS ILLUMINATED. TECH CHECKED ANTI-SKID FAULT INDICATOR WITH NO FAULTS DETECTED IA W CE560XLS AMM 32-44-00. A GVI OF THE COCKPIT FOUND THE POWER BRAKE CB POPPED. TECH RESET THE POWER BRAKE CB WHICH IMMEDIATELY CAUSED THE POWER BRAKE HYDRAULIC PUMP TO OPERATE CHARGING THE BRAKE ACCUMULATOR AND EXTINGUISHING THE BRAKE PRESSURE LOW AND ANTI-SKID WARNING LIGHTS. TECH IS IN WORK PERFORMING POWER BRAKE OPS AND ANTI-SKID OPS CHECKS IAW CE560XLS AMM 32-44-00 AND 32-44-20. OPS AND FUNCTIONAL CHECKS GOOD NO DEFECTS NOTED. MCC REQUEST TECHS REMOVE AND REPLACE BRAKE HYDRAULIC PUMP MOTOR FOR PRECAUTIONARY PURPOSES. REMOVED BRAKE HYDRAULIC PUMP MOTOR AND INSTALLED OVERHAULED CONDITION BRAKE HYDRAULIC PUMP MOTOR IAW CE560XLS AMM 32-44-20. PERFORMED POWER BRAKE AND ANTISKID OPS AND FUNCTIONAL CHECK IAW CE560XLS AMM 32-44-00 AND 32-44-20. OPS AND FUNCTIONAL CHECKS GOOD NO DEFECTS NOTED.

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