Service difficulty report · Floorbeam · Boeing 75726D

Difficulty date
February 26, 2016
Submitted
March 1, 2016
Operation
Air carrier
Aircraft
N821DX
Make and model
Boeing 75726D
Aircraft serial
33961
Aircraft time
29,224 hours, 17,053 cycles
Part
Floorbeam
Condition
Corroded
Location
Bs 365
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

CABIN FLOORBEAM BS 365, RBL 1 - 50, TOP SURFACE HAS CORROSION AND CUTS. BLENDED AND REMOVED CORROSION TOP SURFACE IAW SRM 53-00-51, FIG 101 ALLOWABLE DAMAGE DETAIL IV. ORIGINAL MATERIAL THICKNESS .125" IAW DWG BAC 1518-338. MATERIAL LOSS .030. FOUND OUT OF LIMITS IAW SRM 53-00-51, FIG 101, DETAIL II & III. L=49.0", W= 2.0", D =.030". DURING ACCOMPLISHMENT OF REPAIR IAW SRM 53-00-51. REPAIR 8, FOUND 4 FASTENERS WITH SHORT E.D. COMMON TO THE FLOORBEAM WEB AT RBL70. ACCOMPLISHED REPAIR IAW ER/A 541055-14, REV ORIGINAL.

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