Service difficulty report · Wire Harness · Saab SF340A

Difficulty date
January 28, 2022
Submitted
February 24, 2022
Operation
Air carrier
Aircraft
N651BC
Make and model
Saab SF340A
Aircraft serial
340A076
Aircraft time
19,968 hours, 50,837 cycles
Part
Wire Harness
Part number
7292531503
Condition
None
Location
Lt Engine
Stage of operation
TO
How discovered
O
Nature of condition
O
Precautionary procedure
C

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

What was found

WHILE INCRISING POWER LEVERS AT START OF T/O ROLL, L ENGINE TORQUE UNCOMANDED TO 120% ( RED LIGHT ON ) REDUCED POWER LEVER, ENGINE DID NOT RESPOND. SHUT ENGINE DOWN. ASYMETRIC THRUST FROM RUNNING RIGHT ENGINE QUICKLY CAUSED PLANE TO ROTATE TO THE LEFT. RIGHT ENGINE WAS SHUT DOWN. - REPLACED AUTOCOARSEN COMPUTER, CHECKED OUT WIRING FOR 64 DEG SWITCH TO RELAYS 43KA AND 44KA AND TO THE CTOT PANEL CHECKED GOOD. FOUND THE BOTTOM GEVERNOR PREMATURELY ENGAGING REPLACED HMU AND OPS CHECK NORMAL. AFTER A SUCCESSFUL FCF WITHOUT REPEATING THE FAULT, WE DECIDED TO CHANGE THE ENGINE HARNESS AS A PRECAUTION.

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