Service difficulty report · Wire · Cessna 208B

Difficulty date
May 16, 2008
Submitted
July 22, 2008
Operation
General aviation
Make and model
Cessna 208B
Aircraft serial
208B0989
Part
Wire
Condition
Shorted
Location
Starter Gen
Component
Starter Gen
Component part number
APC200SGL119Q2RX
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

ON (2) RECENT OCCASIONS (2) AIRCRAFT HAVE HAD IDENTICAL DISCREPANCIES WITH THE STARTER ENERGIZED (SE) CIRCUIT. DURING A NORMAL START THE SE ANNUNCIATOR DID NOT EXTINGUISH NORMALLY/AUTOMATICALLY AS THE ENGINE NG INCREASES. THE ANNUNCIATOR STAYS ON UNTIL THE PILOT MOVES THE STAT SWITCH TO "OFF" AT WHICH TIME THE LIGHT GOES OUT AND THE GENERATOR COMES ON-LINE. TROUBLESHOOTING IN BOTH OF THESE CASES REVEALED HIGH RESISTANCE IN THE SPEED SENSOR CIRCUIT. FURTHER INSPECTION REVEALED THAT THIS WAS DUE TO POOR WORKMANSHIP (CRIMPED AND POORLY SOLDERED) ON THE WIRE CONNECTIONS INSIDE THE STARTER/GEN (S/G CONNECTOR. WIRE WAS PINCHED BETWEEN CONNECTOR AND CASE. IN BOTH CASES THE S/G HAD BEEN RECENTLY OVERHAULED. (K)

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