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
Cracked
Location
Zone 200
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 1 HOLE AT RBL 41 FOUND CRACK RUNNING AFT. FLOORBEAM UPPER CHORD AFT FLANGE AT RBL 41" AREA HOLE OVERSIZED BY INCREMENT TO FINAL HOLE SIZE .309" GAGE DISTANCE IS 0.500". E/D= 1.618" WITHIN SB 53A2431 PART 3, TABLE 1 REQUIREMENT. NO REPAIR IS REQUIRED, CONTINUE INSPECTION IS REQUIRED AS PER SB 53A2431 PART 3.

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