SDR 2024F00307

Service difficulty report · Anti-Ice Valve · Cessna 525B

Difficulty date
November 22, 2024
Submitted
November 25, 2024
Operation
General aviation
Aircraft
N428JE
Make and model
Cessna 525B
Aircraft serial
525B0543
Aircraft time
3,321 hours, 2,444 cycles
Engine
Wilint FJ443A
Engine time
3,321 hours, 2,416 cycles
Part
Anti-Ice Valve
Condition
Failed
Location
Zone 600
Stage of operation
CL
How discovered
O
Nature of condition
M
Precautionary procedure
A

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

What was found

DEPARTING KBOI, DURING CLIMB, THE CREW TURNED ON ALL ANTI-ICE SYSTEMS (LEFT AND RIGHT WING AND ENGINE ANTI-ICE; TAIL DE-ICE (AUTO); WIND SHIELD ANTI-ICE (BLEED SWITCH LOW, LEFT AND RIGHT BLEED AIR KNOBS MAX). SHORTLY AFTER ENGAGING THE ICE PROTECTION SYSTEMS, THE RIGHT ENGINE ITT INDICATOR ON THE ENGINE INDICATION SYSTEM WAS DISPLAYING AN OVERTEMPERATURE. CREW ALSO OBSERVED AN AMBER WING A/I OVERTEMP R AND A T2 HEATER FAIL R CAS MESSAGE ON THE PFD. CREW NOTIFIED ATC AND REQUESTED RETURN TO KBOI. THEY DID NOT DECLARE AN EMERGENCY. THE LANDING BACK AT KBOI WAS UNEVENTFUL. MX HAS DOWNLOADED FADEC AND AIRFRAME DATA LOGS AND SENT TO TEXTRON AND WILLIAMS FOR EVAL. WE BELIEVE THE RIGHT ANTI-ICE VALVE FAILED AND ALLOWED FULL UN-REGULATED BLEED AIR TO BE SENT TO THE RIGHT WING. THIS OVER-TEMPED THE ENGINE AS WELL AS THE WING LEADING EDGE. WE HAVE PHYSICAL HEAT DAMAGE TO THE RIGHT WING LEADING EDGE IN THE FORM OF BUCKLING/CREASING. THE AIRCRAFT IS GROUNDED WAITING ON RESOURCES TO TROUBLESHOOT.

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