SDR CALA2025062605902

Service difficulty report · Control Unit · Boeing 7878

Difficulty date: June 23, 2025
Submitted: June 26, 2025
Operation: Air carrier
Aircraft: N20904
Make and model: Boeing 7878
Aircraft serial: 34824
Aircraft time: 48,708 hours, 6,257 cycles
System (JASC): 3350 · Emergency Lighting
Part: Control Unit
Part number: 10026003
Condition: Inoperative
Location: Zone 200
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

EMERGENCY PATH LIGHTING ROWS 30-32 DOES NOT OPERATE. FAULT 33-11624 ACTIVE. LAMP DRIVER FAILED 30F,31F,32F LIGHTS DO NOT ILLUMINATE 30D,31D,32D LIGHTS DO NOT ILLUMINATE FOUND ROW 30D TERMINAL END NOT CONNECTED TO WIRE. RETERMINATED WIRE REF SWPM 20-30-11 PG 56 R&R WCU M3351, OPS NML, REF 33-51-07.

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