SDR UIEA2026071300597

Service difficulty report · None · Boeing 74748EF

Difficulty date: October 9, 2026
Submitted: October 10, 2026
Operation: Air carrier
Aircraft: N419MC
Make and model: Boeing 74748EF
Aircraft serial: 28367
Aircraft time: 121,274 hours, 20,941 cycles
System (JASC): 5100 · Standard Practices/Structures
Part: None
Condition: None
Location: None
Stage of operation: NR
How discovered: O
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

UNABLE TO CARRY OUT LFEC PER WORK CARD 53-F64K-00-01 ON LTH DRAIN MAST CUTOUT UNDER FAIRINGS STD 42L TO 43L AT BS 870 DUE TO NO DOUBLER INSTALLED. ONLY TWO DRAIN MASTS INSTALLED (DIFFERENT FROM THE WORK CARD). PERFORMED HFEC SCAN PER 747 NDT MANUAL D6-7170, PART 6, 51-00-00, PROCEDURE 23 ON FUSELAGE SKIN AREAS SURROUNDING THE DRAIN MAST CUTOUTS, IN LIEU OF 747 NDT MANUAL D6-7170, PART 6, 53-30-00, PROCEDURE 5. NO FURTHER DEFECTS NOTED.

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