Service difficulty report · Threshold Web · Boeing 7377H4

Difficulty date
May 2, 2022
Submitted
June 9, 2022
Operation
Air carrier
Aircraft
N477WN
Make and model
Boeing 7377H4
Aircraft serial
33988
Aircraft time
60,414 hours, 35,826 cycles
Part
Threshold Web
Condition
Corroded
Location
Aft 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 AFT CARGO BAY THRESHOLD AT RBL 26 BS 807+3; BS 807+6; BS 827+19. / [01] VERIFIED APPLICABILITY FOR ALLOWABLE DAMAGE LIMITS IAW SRM SRM 53-60-15-1A-1 ALLOWABLE DAMAGE 1 AND IDENTIFICATION IAW SRM 53-60-15-0I-1 IDENTIFICATION 1;[02] UPDATE STEP 1-3;[03] CERTIFIED CORRECTIVE ACTION 1-2.;[04] STEP 1-3 VERIFIED OUT OF LIMITS AND CORRECTIVE ACTION 1.;[05] RECEIVED A NEW ACB DOOR THRESHOLD WEB PN 146A8123U25 FROM STORES REF PO 863713.<BR>LOCATED AND DRILLED NEW WEB IAW SRM 51-40-05 AND DWG 146A8120 REV -;[06] VERIFIED CORRECTIVE ACTION ENTRY 5.;[07] MEASUREMENTS;[08] UPDATED MEASUREMENTS;[09] VERIFIED CARD COMPLETE.

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