Service difficulty report · Switch · Boeing 757224

Difficulty date
June 1, 2021
Submitted
June 2, 2021
Operation
Air carrier
Aircraft
N17133
Make and model
Boeing 757224
Aircraft serial
29282
Aircraft time
87,239 hours, 18,389 cycles
Part
Switch
Part number
413097003
Condition
Failed
Location
Anti-Ice System
Stage of operation
TX
How discovered
O
Nature of condition
B
Precautionary procedure
O

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

What was found

SPARK ON OVERHEAD PANNEL NEAR ANTI-ICE SWITCHES ON TAXI IN FOUND WIRE BUNDLE FOR CONNECTOR D3505 (ANTI-COLLISION AND LIGHTING PANEL) LIGHTING PANEL) FOUND WIRE BUNDLE FOR CONNECTOR D3505 (ANTI-COLLISION AND PHOTOS ADDED. PHOTO ADDED SEE WDM 33-44-21 PG 1 FOUND WHITE ANTI COLLISION LIGHT SWITCH ITEM 55 SHORTED . ( SEE PHOTOS ABOVE) ALSO BURNT HOLE INTO RED ANTI COLLISION SWITCH ITEM 57 . SHORTS. ALL CIRCIT BREAKERS FOUND CLOSED. AC SIDE IS IN GOOD CONDITION.. NEED TO REPLACE SWITCH 55 AND 57( LOCATED ON MODULE ASSY M 56) . ALSO NEED TO REPLACED SWITCH BODY ASSEMBLY. (115AC ) AND FOR SHORTS . VOLTAGE CHECKED GOOD AND FOUND NO REF WDM 33-44-11 AND 33-44-21 . CHECKED FOR CORRECT VOLTAGE REPLACED ANTI COLLISION WHITE (55) SWITCH AND RED ANTI LIGHT (57) SWITCH SEE SWPM 20-84-15 . RECRIMPED WIRE# 2 REF WDM33-44-21 AND SWPM 20-60-02. REINSTALLED PANEL ALL LIGHTS OP CHECKED GOOD.