Service difficulty report · Regulator · Dhav DHC8102

Difficulty date
September 8, 2005
Submitted
June 6, 2006
Operation
General aviation
Make and model
Dhav DHC8102
Aircraft time
39,181 hours
Engine
Pwa PW120A
Propeller
Hamstd 14SF7
Part
Regulator
Part number
38962E
Part serial
RF3946
Condition
Malfunctioned
Location
De Ice System
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

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

What was found

NR 2 ENGINE FORWARD DE-ICE VALVE P/N 28E96-2D WAS FOUND DAMAGED DURING 3 MONTH LUMP INSPECTION WHILE PERFORMING ZONAL TASK CARD 422 (PANEL 422DT) THERE DC FEED CABLES WERE POSITIONED WRONG AND HAD CHAFED THROUGH RUBBER COATING OF TERMINAL AND HAD SHORTED AGAINST FORWARD DE-ICE VALVE, THERE WAS SUBSTANTIAL DAMAGE TO THE VALVE, RESULTING IN AN UNRESTRICTED BLEED AIR LEAK FROM THE BOTTOM OF THE VALVE. VALVE WAS REMOVED, THE CABLES WERE INSPECTED WITH NO DAMAGE NOTED THEN REPOSITIONED AND THE TERMINAL COVERS WERE REPLACED. THE SURROUNDING AREA WAS ALSO INSPECTED WITH NO DAMAGED NOTED. THE VALVE WAS REPLACED, LEAK AND FUNCTION CHECKED SERVICEABLE, PANEL 422DT WAS RESEALED WITH PRC 1422 B1/2.