Service difficulty report · Rib · Boeing 737322

Difficulty date
December 4, 2007
Submitted
December 6, 2007
Operation
Air carrier
Aircraft
N370UA
Make and model
Boeing 737322
Aircraft serial
24539
Aircraft time
50,546 hours, 34,220 cycles
Engine
Cfmint CFM563C1
Part
Rib
Condition
Cracked
Location
Wing
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

NR 2 MAIN FUEL TANK LT RIB LOWER CHORD CRACKED WBL 135.5 BETWEEN WING STRINGERS S2 AND S3. CRACK IS APPROXIMATELY 2.5 INCH LONG & ORIGINATES IN THE CUTOUT RADIUS OF THE LOWER RIB CHORD. MAJOR REPAIR ACCOMPLISHED: TRIMMED OUT DAMAGE, FABRICATED & INSTALLED REPAIR TEE, VERTICAL STIFFENER & FILLER.