SDR NWAA071906731

Service difficulty report · Vertical Beam · Boeing 747251B

Difficulty date: May 6, 2007
Submitted: May 22, 2007
Operation: Air carrier
Aircraft: N631US
Make and model: Boeing 747251B
Aircraft serial: 23111
Aircraft time: 85,821 hours, 12,772 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Vertical Beam
Condition: Cracked
Location: Bs 300
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

DURING "L" CHECK WHILE ACCOMPLISHING VERTICAL BEAM INSPECTIONS PER BOEING SB 747-53A2293 FIGURE 4, CRACKS WERE FOUND COMMON TO BS 300 AND BS 320 LT AND RT VERTICAL BEAM WEBS. ALSO, CRACKS WERE FOUND COMMON TO THE BS 280 RT VERTICAL BEAM WEB. REPAIRED PER EA 67-209467.