Service difficulty report · Duct · Boeing 74744AF

Difficulty date
June 8, 2026
Submitted
June 16, 2026
Operation
Air carrier
Aircraft
N577UP
Make and model
Boeing 74744AF
Aircraft serial
35666
Aircraft time
63,511 hours, 9,924 cycles
Part
Duct
Part number
112U47202
Condition
Damaged
Location
Zone 600
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 R/H WING FUEL VENT DUCT FWD SIDE HAS ENLARGE HOLE. PERFORMED NDT/UT FOR REWORKED AREA PLUS 6'' AROUND HEATED AREA I.A.W 747 NTM PART1 51-01-01 REV:182. FOUND R/H WING FUEL VENT DUCT FWD SIDE HAS ENLARGE HOLE. I.A.W. 747-400F SRM 57-51-01-2R-1 REFER TO SRM 51-70-17-0G-0 REV. 106 REMOVE THE ENLARGED MATERIALS AND CLEAN. BOND THE REPAIR PLIES WITH RESIN CURED AT 200°F FOR 220 MINUTES WITH MINIMUM VACUUM OF 22 IN/HG. CONDITION CHECK IS SATISFACTORY.

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