Service difficulty report · Pump · Cessna 120

Difficulty date
September 17, 2022
Submitted
September 19, 2022
Operation
Air carrier
Aircraft
N377QS
Make and model
Cessna 120
Aircraft serial
6800187
Aircraft time
13,230 hours, 8,774 cycles
Part
Pump
Part number
99146433
Part serial
K1541
Condition
Damaged
Location
Hyd System
Stage of operation
NR
How discovered
L
Nature of condition
K, J
Precautionary procedure
A

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

What was found

IN FLIGHT, AMBER CAS HYD PRESSURE LOW RT. LATER AN AMBER CAS HYD VOLUME LOW. RAN QRH. HYD FLUID DRIPPING FROM RT ENG ON POST FLT. FOUND RT HYD LINE & CLAMPS SHEARED. R&R LT HYD EDP WITH OVERHAULED. R&R RT EDP WITH REPAIRED. R&R LT HYD MANIFOLD WITH OVERHAULED, R&R RT HYD MANIFOLD WITH OVERHAULED. REPLACED AUX PUMP FILTER, LT & RT PRESSURE FILTER & LT & RT CASE FILTER & RT HYD LINE. PERFORMED EDP PRIMING, BLEEDING COMPLETE. SAT OPS CHECKS OF SPOILERS, THRUST REVERSERS, BRAKES, & PERFORMED SAT LEAK CHECKS ON ALL REMOVED & REPLACED ITEMS. SERVICED HYD SYS WITH HYD OIL. ALL WORK IAW AMM 12-12-02, 12-12--03, 29-10-00, 29-10-01, 29-10-02, 29-10-03, 29-10-04, 29-10-11, 29-20-01, & 78-30-00.

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