Service difficulty report · Angle · Boeing 74747UF

Difficulty date
December 20, 2025
Submitted
December 22, 2025
Operation
Air carrier
Aircraft
N476MC
Make and model
Boeing 74747UF
Aircraft serial
29256
Aircraft time
103,250 hours, 18,818 cycles
Part
Angle
Part number
65B0188730
Condition
Cracked
Location
Zone 100
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

FOUND 1 INCH LENGTH CRACK ON RH LONGERON BOX FRAME (PN: 65B15001-80) REPAIRED PER EA 4453A258 PART 1, REQUIRE TO PERFORM REPEAT INSPECTION PER EA 4453A258 PART 2. (14340)(<P>WHEN ACCOMPLISHED REPEAT INSPECTION PER EA 4453A258 PART 2, FOUND CRACK ON CLIP AND REPAIRED CLIP #30 AT STA 1372 WL152 IAW B747-400 SRM 51-70-11-0G-0 FIG 1 AND ENGINEERING MESSAGE EO #4453C602. NO FURTHER DEFECTS NOTED.

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