SDR SWAA2026040886209

Service difficulty report · Lamp · Boeing 7378H4

Difficulty date: April 4, 2026
Submitted: April 8, 2026
Operation: Air carrier
Aircraft: N8608N
Make and model: Boeing 7378H4
Aircraft serial: 36638
Aircraft time: 43,961 hours, 21,198 cycles
System (JASC): 3350 · Emergency Lighting
Part: Lamp
Condition: Inoperative
Location: Zone 200
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

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

What was found

FORWARD SERVICE DOOR LIGHT ASSEMBLY L1186 DOES NOT ILLUMINATE DURING EMERGENCY LIGHTING TEST. TROUBLESHOT TO FAULTY FUSE IN M2816 POWER SUPPLY. REPLACED FUSE CONNECTED TO D14812; PIN 15 PER WDM 33-51-21, WDM 33-51-11, AND AMM 33-51-06-960-804. REPLACED THE LAMPS L1186 AND TESTED IAW AMM 33-51-01-960-801, TEST NOW PASSES.

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