Service difficulty report · Fastener · Boeing 7378H4

Difficulty date
August 20, 2026
Submitted
September 22, 2026
Operation
Air carrier
Aircraft
N8550Q
Make and model
Boeing 7378H4
Aircraft serial
63579
Aircraft time
28,917 hours, 14,755 cycles
Part
Fastener
Condition
Pulled
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

RIGHT WING LEADING EDGE, JUST INBD OF NR 2 ENGINE HAD THREE FASTENERS PULLING THROUGH SKIN. REMOVED THE THREE PULLING FASTENERS AND OVERSIZED HOLES TO .214 IAW SRM 57-41-01-2R-7. ACCOMPLISHED HFEC HOLE PROBE AND COUNTERSINK INSPECTION IAW NDT PART 6 51-00-00, PROCESS 16, & 53-30-05, NO DEFECTS NOTED. OK TO INSTALL REPLACEMENT FASTENERS. REPAIRED IAW SRM 57-41-01-2R-7.

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