- Difficulty date
- January 4, 2006
- Submitted
- January 13, 2006
- Operation
- Air carrier
- Aircraft
- N520UP
- Make and model
- Boeing 747212B
- Aircraft serial
- 21943
- Aircraft time
- 80,484 hours, 17,793 cycles
- Part
- Floorbeam
- Condition
- Cracked
- Location
- Bs 340
- 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 U/D BS 340 FLOORBEAM UPPER CHORD HORIZONTAL AFT FLANGE 6 FLOOR PNL ATTACH HOLES FOUND CRACKED BETWEEN RBL 10" - RBL 45" (CRACK LENGTH 0.060" ). U/D BS 340 RBL 3" TO RBL 50" FLOORBEAM UPPER CHORD HORIZONTAL AFT FLANGE CRACK HOLES REPAIRED AS PER EO NR B747-5320-12407 FIG 3 PLAN C.