SDR DXTA200702254

Service difficulty report · Ptu · Cessna 750

Difficulty date: June 10, 2007
Submitted: June 15, 2007
Operation: Air carrier
Aircraft: N913QS
Make and model: Cessna 750
Aircraft serial: 7500113
Aircraft time: 7,381 hours, 4,503 cycles
Engine: Allsn AE3007C
System (JASC): 2930 · Hydraulic Indicating System
Part: Ptu
Part number: 99144644
Part serial: 0125
Condition: Inoperative
Location: Hyd System
Part time: 1,878 hours, 1,140 cycles
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: A

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

What was found

HYD A PRESSURE DROPPED TO 2000 PSI, FOLLOWED BY AMBER CAS (HYD LOW QTY B) AND (HYD O TEMP B) MESSAGES ILLUMINATED. REMOVED & REPLACED PTU, LH ENGINE DRIVEN HYD. PUMP & "A" HYD FILTER ASSEMBLY, IAW THE 750 MAINT. MANUAL 29-10-02, 29-10-09 & 29-20-04. OPERATIONAL/LEAK CHECK SATISFACTORY. REPLACED ALL 'A' HYD SYSTEM FILTER. LEAK CHECK SATISFACTORY.

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