Service difficulty report · Master Switch · Cessna 172S

Difficulty date
May 31, 2010
Submitted
June 1, 2010
Operation
General aviation
Aircraft
N963AC
Make and model
Cessna 172S
Aircraft serial
172S10212
Aircraft time
1,018 hours
Engine
Cont IO360*
Part
Master Switch
Part number
S344311
Part serial
LOT0442
Condition
Burned
Location
Instrument Panel
Part time
1,018 hours
Stage of operation
TX
How discovered
O
Nature of condition
B, S
Precautionary procedure
D

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

What was found

((ZB0R)) PILOT REPORTED BURNING SMELL AND FAILURE OF AVIONICS BUSS NR 2 ON RUN-UP. ACFT REPORTED TO MX. TROUBLESHOOTING REVEALED AVIONICS MASTER SWITCH RT SIDE (BUSS 2) ARCING INTERNALLY. REPLACED AVIONICS SWITCH AND OPS CK OK.

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