Service difficulty report · Pressure Valve · Cessna 680SOV

Difficulty date
January 7, 2026
Submitted
January 9, 2026
Operation
Air carrier
Aircraft
N385QS
Make and model
Cessna 680SOV
Aircraft serial
6800115
Aircraft time
15,697 hours, 10,564 cycles
Part
Pressure Valve
Part number
99145202
Part serial
D2916
Condition
Faulted
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

SHORTLY AFTER TAKEOFF POWER APPLIED, HP VALVE FAIL LT AMBER CAS LIGHT ILLUMINATED. COMPLETED APPROPRIATE QRH. INSPECTED GD001 GROUND. NO DISCREPANCIES. RANG WIRING FROM VALVE TO PYLON,. NO DISCREPANCIES. R & R HP VALVE. OPS CHKD GOOD, BUT LEAK CHECKS NOT GOOD. INSTALLED GASKET SEALS . STILL LEAKS. R & R COUPLINGS HOLDING THE HP VALVE WITH TWO NEW GRAFOIL SEALS. LEAK CHKD GOOD. WORKED IAW MM 20-10-40.