Service difficulty report · Support · Boeing 73773V

Difficulty date
August 1, 2021
Submitted
September 3, 2021
Operation
Air carrier
Aircraft
N7839A
Make and model
Boeing 73773V
Aircraft serial
30243
Aircraft time
57,802 hours, 35,522 cycles
Part
Support
Condition
Corroded
Location
Fwd Cargo
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 FCB L/H FLOOR-TO-SIDEWALL SUPPORT; BS 500B+6; LBL 24; WL 156 (MARKED) ; / REMOVED CORRISION FROM FCB L/H FLOOR-TO-SIDEWALL SUPPORT; BS 500B+6; LBL 24; WL 156. P/N 143A7501-80; IN AREA 0.8' X 0.6' X 0.020' DEEP; ORIGINAL THICKNESS 0.040' FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 PER 4.A(2) FIG. 103 DETAIL A <BR>TOOL USED <BR>-DEPTH GAGE <BR>ID:ATS2472. S/N: UNKNOWN. DUE DATE: 06/2022; [03] VERIFIED REMOVED CORRISION FROM FCB L/H FLOOR-TO-SIDEWALL SUPPORT; BS 500B+6; LBL 24; WL 156. P/N 143A7501-80; IN AREA 0.8' X 0.6' X 0.020' DEEP; ORIGINAL THICKNESS 0.040' FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 PER 4.A(2) FIG. 103 DETAIL A.; [04] FABRICATED NEW L/H FLOOR TO SIDEWALL SUPPORT USING SPLICE PER BOEING DWG: 143A7501 AND SRM 53-00-53-2R-6 STEP 4. A-H.; [05] LOCATED AND DRILLED NEW L/H SIDE FLOOR TO SIDEWALL SUPPORT PER BOEING DWG:143A7500 AND SRM 51-40-05; ] INSTALLED FCB L/H FLOOR TO SIDEWALL SUPPORT BS 500B+6; LBL 24; WL 156 PER SRM 51-40-02-0G-0 AND BOEING DWG: 143A7500; [18] VERIFIED CORRECTIVE ACTION STEP 15 COMPLETE.

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