Service difficulty report · Floorbeam · Boeing 7377H4

Difficulty date
March 31, 2022
Submitted
May 2, 2022
Operation
Air carrier
Aircraft
N475WN
Make and model
Boeing 7377H4
Aircraft serial
32474
Aircraft time
59,744 hours, 35,276 cycles
Part
Floorbeam
Condition
Corroded
Location
Fuselage
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

CORROSION ON FLOORBEAM AT AFT WET AREA BS986.5 LBL44 TO RBL44 WL208. / [01] REMOVED CORROSION ON FLOOR BEAM AT BS 986 W/L 208 RBL44 2'X3'X.100 ;RBL7 REMOVED 1.6X1.5X.050; AT LBL 42 REMOVED 1.5X1.5X.042 ALL FOUND TO BE OUT OF LIMITS PER SRM 53-70-51-1A-1 STEP 4-H 2 FIG 103;[17] FABRICATED REPAIR PARTS TWO SECTIONS T-CHORD [1] MADE OF BAC1505-101474 #7050-T76511; LOT# 1385019-1 FROM RBL 50 TO LBL 50; TWO EA. ANGLES [2] MADE OF BAC1490-2811#7075 T62 .071' LOT # 1488279-1; TWO EA. ANGLES (3) MADE OF BAC1490-2887#7075 T62 .080' LOT # 1361302-1 AND TWO EA. STRAPS [4] MADE OF 7075 T6 .080' LOT # 1379745-2. LOCATED AND DRILLED ALL PARTS OF REPAIR AND APPLIED CHEMICAL CONVERSION COATING IAW EA 22-153-01043 REV A AND SRM 53-70-51-2R-4 ALTERNATIVE 1.<BR>REQUEST OK TO APPLY PRIMER.

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