Service difficulty report · Stringer · Boeing 747451

Difficulty date
January 25, 2011
Submitted
January 25, 2011
Operation
Air carrier
Aircraft
N668US
Make and model
Boeing 747451
Aircraft serial
24223
Aircraft time
88,742 hours, 10,970 cycles
Part
Stringer
Condition
Deformed
Location
Bs 460-480 S44r
Stage of operation
IN
How discovered
9
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

STRINGER DEFORMED WAS FOUND AT FWD CARGO COMPARTMENT STA 460-480, S-44R. REPAIRED THE DAMAGE STRINGER IAW ER/A 488619-14 REQUIRE REPEAT INSPECTIONS EXTERNAL DETAILED VISUAL INSP AT 3000 FLIGHT CYCLES. INTERNAL DETAILED VISUAL INSP AT 6000 FLIGHT CYCLES. USE THE THRESHOLD THAT WILL OCCUR AT A LATER TIME: 20000 FLT CYCLES AFTER AIRPLANE DELIVERY.6000 FLT CYCLES AFTER THE REPAIR INSTALLATION.