SDR SWAA2020070797644

Service difficulty report · Power Supply · Boeing 7377H4

Difficulty date: July 4, 2020
Submitted: July 7, 2020
Operation: Air carrier
Aircraft: N741SA
Make and model: Boeing 7377H4
Aircraft serial: 29277
Aircraft time: 74,277 hours, 44,107 cycles
System (JASC): 3350 · Emergency Lighting
Part: Power Supply
Condition: Faulty
Location: Emergency Lights
Stage of operation: IN
How discovered: 9
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

EMERGENCY LIGHTS ASSOCIATED WITH M1674 BATTERY CHARGER GO OUT 20 SECONDS AFTER EMERGENCY LIGHT SWITCH IS TURNED ON. REMOVED, REPLACED, AND PERFORMED A GOOD FUNCTIONAL TEST OF M1674 POWER SUPPLY IAW AMM 33-51-06-960-806, STEP 5.E. 1, 2A, 3, 4A, B, 1C, AND 5A.

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