Service difficulty report · Support · Boeing 7377H4

Difficulty date
December 3, 2021
Submitted
January 4, 2022
Operation
Air carrier
Aircraft
N234WN
Make and model
Boeing 7377H4
Aircraft serial
32502
Aircraft time
52,359 hours, 31,270 cycles
Part
Support
Condition
Corroded
Location
Bs 440-500b
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

CORRSION FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT BS 440+17; BS 460+7; BS 480+3;+12; BS 500+9; +14; BS 500A+10; BS 500B+14;+18 LBL 24 ; / [01] EVALUATED CORROSION AT ALL LOCATION; FOUND DEEPEST LOCATION TO BE AT BS 440+17 LBL 24 WL 156. FOUND 0.015 REMOVED FROM ORIG 0.040 IN 1'X1' AREAS. FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING DIAL DEPTH GAUGE ATS 2678 S/N UNKNOWN; [02] VERIFIED EVALUATED CORROSION AT ALL LOCATION; FOUND DEEPEST LOCATION TO BE AT BS 440+17 LBL 24 WL 156. FOUND 0.015 REMOVED FROM ORIG 0.040 IN 1'X1' AREAS. FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING DIAL DEPTH GAUGE ATS 2678 S/N UNKNOWN; [03] BEGAN LOCATING AND DRILLING NEW FCB FLOOR TO SIDEWALL SUPPORT BS396 - BS500D; LBL25; WL156. PER DWG143A7500 AND SRM 51-40-05-0G-0.; [04] LOCATED AND DRILLED NEW FCB L/H FLOOR TO SIDEWALL SUPPORT BS396 - BS500D; LBL25; WL156. PER DWG 143A7500 AND SRM 51-40-05-0G-0; [05] VERIFIED CORRECTIVE ACTIONS STEP 4.; [06] VERIFIED COMPLETED.

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