Service difficulty report · Floorbeam · Boeing 7377H4

Difficulty date
July 25, 2023
Submitted
August 21, 2023
Operation
Air carrier
Aircraft
N292WN
Make and model
Boeing 7377H4
Aircraft serial
32538
Aircraft time
51,861 hours, 31,244 cycles
Part
Floorbeam
Part number
UNKNOWN
Condition
Corroded
Location
Zn 200 Fus Top
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 BS 986 FLOOR BEAM RBL 44 WL 208.<[01] VERIDIED APPLICABILITY FOR ALLOWABALE DAMAGE LIMITS IAW SRM 53-70-51-1A-1 ALLOWABLE DAMAGE 1 AND IDENTIFICATION IAW 57-70-51-0I-1 IDENTIFICATION 1;[02] REMOVED NUT PLATE LOCATED AT BS 986 FLOOR BEAM RBL 44 WL 208. IAW SRM 51-40-02.<BR>REMOVED CORROISON ON BS 986 FLOOR BEAM RBL 44 WL 208. DIMENSIONS L:1' W: .700' DEPTH :0.035' IAW SRM 51-10-02 PARAGRAPH 15.<BR>EVALUATED REWORKED AREA; ORIGINAL THICKNESS 0.150' REMAINING THICKNESS: -115' FOUND OUT ALLOWABLE DAMAGE LIMITS IAW SRM 53-70-51-1A-1 ALLOWABLE DAMAGE 1. FIGURE 103 DETAIL E.<BR>TOOL USED MICROMETER ATS599 DATE DUE :09/2023;[03] VERIFIED APPLICABILITY FOR REPAIR AT BS 986 FLOOR BEAM RBL 44 WL 208 IAW SRM 53-70-51-2R-6 REPIAR 6. ALTERNATIVE 3;[04] VERIFIED CORRECTIVE ACTION STEPS 1-3.;[05] VALIDATED APPLICABILITY OF AWD AND REPAIR PER SRM 53-70-51-2R-6.<BR>VERIFIED COMPLETION OF CORRECTIVE ACTIONS 2.;[06] VERIFIED MAINTENANCE STEP 1.;[07] COMPLETED STEPS 1 AND 3.;[08] COMPLETED STEP 2.;[09] VERIFIED MAINTENANCE STEP 4.;[10] VERIFIED COMPLETION STEP 4;[11] VERIFIED MAINTENANCE STEPS 5 AND 6.;[12] VERIFIED MAINTENANCE STEP 3.;[13] UPDATED MEASUREMENT TABLE.;[14] COMPLETED STEP 5<BR>OK TO INSTALL STRAP GIVEN;[15] VERIFIED MAINTENANCE STEP 6.;[16] VERIFIED COMPLETION STEP 6;[17] VERIFIED MEASUREMENT TABLE.<BR>TASK COMPLETE

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