Service difficulty report · Channel · Boeing 7377H4

Difficulty date
March 17, 2022
Submitted
April 20, 2022
Operation
Air carrier
Aircraft
N472WN
Make and model
Boeing 7377H4
Aircraft serial
33831
Aircraft time
58,559 hours, 34,804 cycles
Part
Channel
Condition
Corroded
Location
Fwd Fuselage
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 FORWARD LAVATORY FLOOR SUPPORT CHANNEL AT B.S. 294.5 - B.S. 312; L.B.L. 10; W.L. 208.1. / [01] REMOVED CORROSION ON FWD LAV SUPPORT CHANNEL BS 294-312 LBL 10 WL 208.1 AREA OF 6'X1.5' 100% MATERIAL LOSS FOUND TO BE OUT OF LIMITS I.A.W SRM 53-10-51-1A-1;[02] CORRECTED MEASUREMENTS;[03] INSPECTED & VERIFIED CORRECTIVE ACTION ITEM 1 & 2.;[04] REMOVED ON FORWARD LAVATORY FLOOR SUPPORT CHANNEL AT BS 294.5 TO BS 312 LBL 10 WL 208.1 IAW SRM 51-40-02;[05] PARTIAL STEPS 1;2;[06] OK TO INSTALL FORWARD LAVATORY FLOOR SUPPORT CHANNEL;[07] RECEIVED ON FORWARD LAVATORY FLOOR SUPPORT CHANNEL AT BS294.5-BS312 LBL10 WL208.1 ITEM 141A5690U1 PO#861051 IAW SRM 51-40-02 AND DWG 141A5600;[08] VERIFIED CORRECTIVE ACTIONS 6 AND 7.;[09] INSTALLED ON FORWARD LAVATORY FLOOR SUPPORT CHANNEL AT BS 294.5 - BS 312 LBL 10 WL 208.1 IAW SRM 51-40-02 AND DWG 141A5600;[10] UPDATED PARTS USED;[11] VERIFIED CORRECTIVE ACTION 9-10;[12] VERIFIED ALL WORK COMPLETE

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