SDR IPXA2020082649438

Service difficulty report · Switch · Boeing 75724APF

Difficulty date: August 23, 2020
Submitted: August 26, 2020
Operation: Air carrier
Aircraft: N475UP
Make and model: Boeing 75724APF
Aircraft serial: 28845
Aircraft time: 19,054 hours, 13,165 cycles
System (JASC): 3411 · Pitot/Static System
Part: Switch
Condition: Failed
Location: Air Data
Stage of operation: NR
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

INSPECTION TYPE:NAFO SELECTED AIR DATA SWITCH AND SMOKE COME OUT OF BEHIND FO'S PANELGVI WIRE BNDL BEHIND F/O'S DISPLAY & BELOW FLOORBRD, NO DMGD WIRES. RT AIR DATA SOURCE SEL RLY CB POPPED ON P11 PANEL. RESET BREAKER, POPPED AGAIN. R/R RLY SWPM 20-81-22 OPS. FOUND RT LDS W/MULTI GGU FATAL FAULTS& ACTIVE IO BUS ACTIVITY DIS FAULTS. R/R GGU IAW MM 34-22-00-1A. R/R R/R FDU/AFD IAW MM 34-22-01-1A. R/R MCP MM22-11-02-402 OPS CHECK GOOD

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