Service difficulty report · Floorbeam · Boeing 7472D7B

Difficulty date
May 3, 2006
Submitted
May 25, 2006
Operation
Air carrier
Aircraft
N522MC
Make and model
Boeing 7472D7B
Aircraft serial
21783
Aircraft time
94,219 hours, 18,764 cycles
Part
Floorbeam
Condition
Damaged
Location
Bs 340
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 340 FLOORBEAM UPPER CHORD AFT FLANGE 3 HOLE AT LBL 29, 31 AND 32 FOUND CRACKS. BS 340 FLOOR BEAM UPPER CHORD AFT FLANGE LBL 29" OVERSIZE TO .309" AND GAGE DISTANCE .440" E/D = 1.423, WITHIN BS53A2431 PART 3 TABLE 1. REQUIREMENT, REPAIR IS NOT REQUIRED. U/D BS 340 FLOORBEAM UPPER CHORD AFT FLANGE LBL 31" AND 32" REPAIRED AS PER SB 53A2431 FIG 9. CONTINUED INSPECTION IS REQUIRED AS PER BS 53A2431 PART 3.

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