Service difficulty report · None · Boeing 7474B5F

Difficulty date
February 12, 2023
Submitted
February 16, 2023
Operation
Air carrier
Aircraft
N446MC
Make and model
Boeing 7474B5F
Aircraft serial
33517
Aircraft time
79,107 hours, 13,689 cycles
Part
None
Part number
2156756A
Part serial
11060B
Condition
None
Stage of operation
CL
How discovered
O
Nature of condition
F, J, N
Precautionary procedure
A

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

What was found

MAIN DECK FIRE WARNING IN FLIGHT(<P>FOUND MD DET B LOOP A & B, DET 16 LOOP A & B FAILED. PER MCC REQUEST, TWO AFOLTS CARDS ALSO NEED TO BE REPLACED. PERFORMED ZONAL INSP, MD CARD COMPARTMENT PER AMM 05-41-02. NO DEFECT FOUND.</P> / <P>LP 1663905-1663906 M9 - M12: REMOVED & REPLACED MD DET #13 & #16 LOOP A & B PER AMM 26-14-01. PERFORMED GND TEST AND TEST PASS IAW AMM 26-14-00.</P> / <P>LP 1663907 M13 - M14: REMOVED & REPLACED AFOLTS CARDS YW8A010 & YW9A006 PER AMM 26-10-01, TEST PASS IAW 26-14-00.</P>)

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