Service difficulty report · Switch · Beech F33A

Difficulty date
January 21, 2010
Submitted
January 22, 2010
Operation
General aviation
Aircraft
N8173C
Make and model
Beech F33A
Aircraft serial
CE1541
Aircraft time
19,441 hours
Part
Switch
Part number
35380132101
Condition
Shorted
Location
Navigation Light
Part time
7 hours
Stage of operation
IN
How discovered
C
Nature of condition
L
Precautionary procedure
K

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

What was found

DURING THE USE OF THE NAVIGATION LIGHTS, THE NAVIGATION LIGHT CIRCUIT BREAKER SWITCH WOULD POP AND NOT RESET. TROUBLESHOT SYS AND FOUND FAULT TO BE WITH CIRCUIT BREAKER SWITCH. REMOVED AND REPLACED SWITCH WITH SAME PN 35-380132-101. THESE SWITCHES ARE SUPPOSE TO BE NEW AND IMPROVED WHICH WAS INSTALLED UNDER AD 2008-13-17 DATED 6 AUG 2008 TO PREVENT FAILURE OF THE CIRCUIT BREAKER TOGGLE SWITCH. THESE CIRCUIT BREAKER SWITCHES ARE STILL CONTINUING TO FAIL INTERNALLY. RECOMMEND THAT MFG INVESTIGATE QUALITY PROCESS AND IMPROVE OR TO SEPARATE THE SWITCH FOR AN INDEPENDENT TOGGLE SWITCH WITH A SEPARATE CIRCUIT BREAKER FOR PROTECTION.

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