SDR CALA2021070501032

Service difficulty report · Circuit Card · Boeing 737724

Difficulty date: July 4, 2021
Submitted: July 5, 2021
Operation: Air carrier
Aircraft: N23721
Make and model: Boeing 737724
Aircraft serial: 28940
Aircraft time: 70,791 hours, 25,251 cycles
System (JASC): 2400 · Electrical Power System
Part: Circuit Card
Part number: M564
Condition: Unsecure
Stage of operation: CL
How discovered: O
Nature of condition: G
Precautionary procedure: A

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

What was found

ON CLIMB OUT MULTIPLE SYSTEMS ON THE OVERHEAD AND FWD PANEL ANN UNCIATORS FAILED T/S IAW SSM 30-41-11, 33-18-11, 32-61-11, 26-21-11, 32-42-11, 28-43-11, 27-81-31, AND 29-35-11. FOUND M564 NOT SECURED. RE-INSTALLED IAW AMM 33-18-00-960-806. ALL OPS CHECKS NORMAL AT THIS TIME REF AMM 33-18-00-710-802. NO FURTHER DEFECTS NOTED AT THIS TIME. ADD EMP:U353871