Service difficulty report · Wire Harness · Cessna 680A

Difficulty date
June 6, 2024
Submitted
June 12, 2024
Operation
Air carrier
Aircraft
N934QS
Make and model
Cessna 680A
Aircraft serial
680A0363
Aircraft time
811 hours, 524 cycles
Part
Wire Harness
Part number
84691531
Condition
Faulted
Location
Cabin Door
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

AFTER CLOSING CABIN DOOR. AMBER CABIN DOOR OPEN CAS MESSAGE REMAINS ILLUMINATED. COMPLETED CABIN DOOR OPEN QRH WITH NO SUCCESS. AMBER CABIN DOOR OPEN REMAINED ON ALONG WITH WHITE CHECK DOORS MESSAGE. AMBER LIGHT NEAR DOOR HANDLE WAS ALSO ILLUMINATED. THE DISCREPANCY COULD BE DUPLICATED. WHEN DOOR WAS CLOSED, DOOR LOCK PAWL WAS NOT CLICKING & SENDING MESSAGE TO PCB TO EXTINGUISH CAS MESSAGE. C/W DOOR RESET PROCEDURE, & WORKED EVERY TIME. CYCLED POWER & DISCREPANCY WOULD RETURN. IF YOU THEN DO RESET PROCEDURE, IT WORKS TILL POWER IS CYCLED. DOOR IS INTERMITTENTLY WORKING. HAVE CHECKED THE S6 SWITCH & WIRING GOOD. S6 SWITCH NEVER GOT MADE BECAUSE THE PAWL DIDNT CONTACT IT. THIS MAKES SWITCH S3 SWITCH NOT TELLING PCB IT WAS MADE; TO TELL DOOR LOCK SOLENOID TO CLOSE, THEN MATING S6 SWITCH. CHECKED ALL WIRING BETWEEN THE 53 & 56 SWITCH & THRESHOLD HARNESS. CHECKED CONTINUITY THROUGH THRSHOLD HARNESS. FOUND NO DEFECTS. CONTACTED TEAM, THEY SUSPECT WIRING, MORE SPECIFICALLY, THE DOOR STEP HARNESS. R & R DOOR STEP HARNESS IAW AMM 52-10-SO. R & R S3 DOOR SWITCH IAW AMM 52-70-10. R & R CED MONITOR PCB. IAW AMM 24-60-40. ORIGINAL SUBMISSION DATE: 6/7/2024.

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