SDR DALA1163446310

Service difficulty report · Floorbeam · Boeing 747451

Difficulty date: November 3, 2011
Submitted: November 15, 2011
Operation: Air carrier
Aircraft: N670US
Make and model: Boeing 747451
Aircraft serial: 24225
Aircraft time: 92,135 hours, 11,261 cycles
System (JASC): 5315 · Fuselage Main, Floor Beam
Part: Floorbeam
Condition: Cracked
Location: Fuselage
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

CRACK WAS FOUND ON FLOORBEAM WEB AT STA 840 RBL 5 WL 305 IN CABIN. L=1.5 SCEPTRE LOG PAGE ENTERED AND DEFERRED FOR SDR REPORTING. PERFORMED CATEGORY "B" REPAIR PER SRM 53-00-51 REPAIR 1 (B747-400). VISUALLY INSPECT THE REPAIR PARTS, UPPER AND LOWER CHORDS AND WEB IN THE REPAIR AREA AS SHOWN IN B747-400 SRM 53-00-51 REPAIR 1, DETAIL III, SECTION E-E AND SECTION F-F. ON 15NOV11, 41/200 CRACK WAS FOUND ON FLOORBEAM WEB. PLACE ON MONITOR.