Service difficulty report · Stiffener · Boeing 747211B

Difficulty date
May 9, 2006
Submitted
May 24, 2006
Operation
Air carrier
Aircraft
N521UP
Make and model
Boeing 747211B
Aircraft serial
21944
Aircraft time
77,205 hours, 18,330 cycles
Part
Stiffener
Part number
65B0794234
Condition
Cracked
Location
Nlg Ww
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

NWW RT SIDE PANEL BS 280-300 WL 170 STIFFENER RADIUS AREA FOUND INTERMITTENT CRACKS, CRACK LENGTH 1/4" - 3/8". STIFFENER REPLACED AND INSTALLED AS PER SRM 51-10-01 PG 9 AND 51-30-02.