Service difficulty report · Stiffener · Boeing 747121

Difficulty date
February 13, 2007
Submitted
March 14, 2007
Operation
Air carrier
Aircraft
N683UP
Make and model
Boeing 747121
Aircraft serial
20353
Aircraft time
90,184 hours, 22,066 cycles
Part
Stiffener
Condition
Cracked
Location
Bs 1500
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 M/D STA 1500 RBL 58 FLOOR SUPPORT INTERCOSTAL WEB ATT STIFFENER FOUND CRACKED. CRACK LENGTH .25 INCH. SUPPORT STIFFENER REPLACED AS PER SRM 51-10-01 PG 9 AND INSTALLED AS PER SRM 51-30-02.