SDR 145499

Service difficulty report · Wire · Emb EMB145

Difficulty date
September 17, 2002
Submitted
December 3, 2002
Operation
Air carrier
Aircraft
N325JF
Make and model
Emb EMB145
Aircraft serial
145499
Engine
Allsn AE3007A
Part
Wire
Condition
Failed
Location
Light Dimmer
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

WIRE NR W101-0072-20 WAS FOUND BURNED IN HALF DURING INSPECTION AND TROUBLE SHOOTING TO CORRECT AN MEL ON THE BACK LIGHTING ON THE PILOTS SIDE ELECTRONIC CLOCK. DURING INVESTIGATION IT WAS FOUND THAT THE SYSTEM DESIGN USED 20 GAUGE WIRE AT THE OUTPUT OF THE DC LAMP DIMMER THAT HAS AN INTERNAL CIRCUIT PROTECTION THAT TRIPS AT 16.75 AMPS WHICH EXCEEDS THE RATING FOR 20 GAUGE WIRE. RECOMMEND REEVALUATION OF SYSTEM DESIGN AND PROTECTION OF WIRING ON OUTPUT SIDE OF DC LAMP DIMMER.

More about the Emb EMB-145