- Difficulty date
- January 3, 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
- Corroded
- Location
- Bs 400
- 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 400 RBL 40" - RBL 68" FLOORBEAM UPPER CHORD ANCHOR NUTS AREA FOUND CORROSION. CORROSION BLEND OUT 0.055" BY 2" BY 2" EXCEED SRM 53-10-01 FIG 1 LIMITS, U/D BS 400 RBL 33 TO MOST RT O/B FLOORBEAM UPPER CHORD REPAIRED IAW SRM 53-10-07 FIG 8.