Service difficulty report · Spar · Boeing 747121

Difficulty date
April 6, 2003
Submitted
April 30, 2003
Operation
Air carrier
Aircraft
N681UP
Make and model
Boeing 747121
Aircraft serial
19661
Aircraft time
100,611 hours, 25,820 cycles
System (JASC)
5711 · Wing Spar
Part
Spar
Condition
Corroded
Location
Nr 4 Slat
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

INSPECTION TYPE: C, LT WING UPPER SURFACE FRONT SPAR RABBET PANEL FOUND BULGE AT NR 4 SLAT O/B AREA AS MARKED. LT WING UPPER SURFACE FRONT SPAR REPAIRED AS RS R57-25-35006 AND ENGINEERING FILE NUMBER : 747-57-20040 AT NR 4 SLAT O/B AREA WS 1294.