Service difficulty report · Frame · 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
Part
Frame
Condition
Damaged
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

PER DWG 624U0072 SHEET 13, 08 FASTENERS ARE SHOWN BETWEEN STR-7 AND STR-8, BUT AT STA 2598 BLKHD HORIZONTAL STABILIZER FWD SIDE, ONLY 04 EA FASTENERS ARE INSTALLED PER SIDE OF BOTH LHS AND RHS FRAME . REWORK CARRIED OUT AT STA 2598 BULKHEAD HORIZONTAL STABILIZER FWD SIDE ON BOTH LHS AND RHS FRAME OUTER CHORD AREA IAW EN 3510-26 REV 0 AND EN 3532-26 REV 0. REPAIR CLASSIFIED AS "MAJOR" AND CATEGORIZED AS "CATEGORY B" PERMANENT REPAIR WITH THRESHOLD INSPECTION OF 23,941 TOTAL AIRPLANE FLIGHT CYCLES AND REPEAT INSPECTION INTERVAL OF 3,000 AIRFRAME FLIGHT CYCLES AS PER EN 3510-26 REV 0 AND EN 3532-26 REV 0. NO FURTHER DEFECTS NOTED.

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