Service difficulty report · Web · Boeing 7377H4

Difficulty date
December 8, 2021
Submitted
December 22, 2021
Operation
Air carrier
Aircraft
N910WN
Make and model
Boeing 7377H4
Aircraft serial
36618
Aircraft time
45,600 hours, 27,244 cycles
Part
Web
Condition
Corroded
Location
Threshold
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

CORROSION ON AFT CARGO BAY DOOR THRESHOLD SUB WEB AT RBL 20 BS 787+9; RBL 27 BS 807+3; BS 807+5; BS 807+8. ; / [01] EVALUATED CORROSION AT ALL LOCATIONS; FOUND DEEPEST LOCATION TO BE AT BS 787+9 RBL 20 WL 157; FOUND 0.015 REMOVED FROM ORIG 0.045 FOUND TO BE OUT OF LIMITS PER SRM 53-60-15-1A-1 USING DEPTH GAUGE ATS2678 S/N UNKNOWN; [02] VERIFIED CORRECTIVE ACTION ENTRY 1. OUT OF LIMITS.; [03] LOCATED AND DRILLED THRESHOLD SUB WEB AT RBL20 BS 794-847 IAW SRM 51-40-05-0G-0 AND DWG 146A8340; DWG 146A8340; DWG 146A8120; [04] LOCATED AND DRILLED NEW SUB THRESHOLD WEB AT RBL20 BS 794-847; AND INSTALLED NUTPLATES IAW SRM 51-40-02-0G-0; SRM 51-40-05-0G-0 AND DWG 146A8340; DWG 146A8340; DWG 146A8120; [05] VERIFIED CORRECTIVE ACTIONS 3 AND 4.; [06] RII NOT REQUIRED FOR THIS TASK.

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