SDR EIA2004106

Service difficulty report · Floorbeam · Boeing 747273C

Difficulty date: September 23, 2004
Submitted: November 2, 2004
Operation: Air carrier
Aircraft: N470EV
Make and model: Boeing 747273C
Aircraft serial: 20653
Aircraft time: 89,121 hours, 19,948 cycles
System (JASC): 5315 · Fuselage Main, Floor Beam
Part: Floorbeam
Condition: Damaged
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

BS 420 FLOORBEAM UPPER DECK, UPPER CHORD FWD FLANGE. HOLE AT RBL 52.0 WAS REAMED TO MAX 0.34 DIAM, WITH CRACK INDICATIONS REMAINING. MUST BE REPAIRED PER SB. REPAIR HOLE BS 420, RBL 52.0 FWD HORIZ FLANGE PER SB 747-53-2439, FIG 9, SHT 1-6