SDR KCSA2025102057

Service difficulty report · Relay · Boeing 77736NER

Difficulty date: October 20, 2025
Submitted: October 22, 2025
Operation: Air carrier
Aircraft: N770CK
Make and model: Boeing 77736NER
Aircraft serial: 32792
Aircraft time: 73,428 hours, 13,628 cycles
System (JASC): 5240 · Service Doors
Part: Relay
Part number: BACR13CF2AB
Condition: Faulted
Location: Zone 800
Stage of operation: IN
How discovered: V
Nature of condition: J
Precautionary procedure: K

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

What was found

DOOR FLIGHT LOCK R1 STATUS MESSAGE. ACTION TAKEN: REMOVED AND REPLACED RELAY K52201 IAW FIM 52-11 TASK 826 AND SWPM 20-81-22, NO HELP. CORROSION FOUND ON R1 DOOR FLIGHT LOCK MECHANISM SPRING. LUBRICATED FLIGHT LOCK MECHANISIM IAW AMM 12-21-20, OPS CHECKED GOOD IAW AMM 52-11-26, STATUS CLEARED.

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