Service difficulty report · Web · Boeing 7377H4

Difficulty date
May 3, 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
Web
Part number
147A562011
Condition
Corroded
Location
Cabin Floor
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 PASSENGER CABIN FLOOR WEB AT STA 1006+8; WL 208; LBL 39. / [01] REMOVED CORROSION ON WEB AT CABIN FLOOR AT BS1005+8 WL208 LBL39 IN A 1'X1' AREA PER SRM 51-10-02-0G-0 STEP 15;[02] VERIFIED CORRECTIVE ACTION 1;[03] NO LIMITS FOUND ON SRM FOR AFT L/H SHEAR WEB BS986-BS1016 LBL39 REMOVE AND REPLACE PART IS APPLICABLE I.A.W SRM 51-10-02-0G-0 PAR 9.C;[04] REMOVED AFT L/H SHEAR WEB BS986-BS1016 LBL39 WL208 I.A.W SRM 51-40-02-0G-0;[05] LOCATED AND DRILLED NEW AFT L/H SHEAR WEB BS986-BS1016 LBL33-LBL45 WL208 I.A.W SRM 51-40-05-0G-0 AND BOEING DWG 147A5600;[06] VERIFIED CORRECTIVE ACTION 3-5;[07] OK TO INSTALL CABIN FLOOR WEB AT STA 986 - 1026; WL 208; LBL 33-LBL47.;[08] OK TO INSTALL GIVEN.;[09] ALL PERMANENT AND TEMPORARY FASTENERS INSTALLED ON WEB AT STA 986 - 1026; WL 208; LBL 33-LBL47. BEFORE SEALANT CURE TIME C-20 MIXED AT 03:00 UTC MAY 17TH 2022 IAW SRM CH 51-40-02 AND DRW#147A5600 ID#33.;[10] VERIFIED CORRECTIVE ACTION ENTRY 9.;[11] CHANGED REPAIR TYPE TO 'MINOR';[12] COMPLETED INSTALLATION OF THE AFT L/H SHEAR WEB BS986-BS1016 LBL33-LBL45 WL208 IAW SRM 51-40-02-0G-0 AND DWG 147A004; 147A5600; 147A0070 AND 149A1401;[13] CERTIFY;[14] RII INSPECTED ACTION 12;[15] RII INSPECTION COMPLETE;[16] UPDATED CHART;[17] CERTIFY;[18] INSPECTION COMPLETE

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