Service difficulty report · Support · Boeing 7377H4

Difficulty date
April 21, 2022
Submitted
May 9, 2022
Operation
Air carrier
Aircraft
N927WN
Make and model
Boeing 7377H4
Aircraft serial
36889
Aircraft time
45,530 hours, 27,478 cycles
Part
Support
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 FLOOR TO SIDEWALL SUPPORT AT RBL 21 BS 907+15; BS 927+6; BS 927+17. / [01] .REMOVED CORROSION ON AFT CARGO TO SIDEWALL SUPPORT AT BS.907+15 ;BS927+6 ;BS927+17 AREA FOUND TO BE OF LIMITS AT BS 927+17 L=2.000' W=0.8' D=0.015' ORIGINAL THICKNESS 0.040' REMAINING MAT 0.025' MAX LOSS 0.015' IAW SRM 53-00-53-1A-2 FIG 103 DETAIL C USED TOOL ID ATS 1671 DATE 01/2022 DUE 10/2022;[02] SRM 53-70-53-0I-2 IDENTIFICATION AND SRM 53-00-53-1A-2 ALLOWABLE DAMAGE ARE APPLICABLE;[03] VERIFIED CORRECTIVE ACTION 1 AND 2;[04] LOCATED AND DRILLED NEW SIDEWALL SUPPORT AT BS.907 TO BS 947 I.A.W SRM 51-40-05-0G-0 AND DWG 147A7501.;[05] LOCATED AND DRILLED NEW SIDEWALL SUPPORT AT BS.867 TO BS 947 I.A.W SRM 51-40-05-0G-0 ; DWG 147A7501 AND DWG 146A7502.;[06] VERIFIED CORRECTIVE ACTION #5.;[07] OK TO INSTALL NEW SIDEWALL SUPPORT AT BS.867 TO BS 947;[08] INSPECTED & VERIFIED CORRECTIVE ACTION ITEM 7. OK TO INSTALL NEW FLOOR TO SIDEWALL ANGLE IN ACB BS 867 - BS 947; RBL 21 GIVEN.;[09] INSTALLED NEW FLOOR TO SIDEWALL ANGLE IN ACB BS 867 - BS 947; RBL 21 I.A.W SRM 51-40-02-0G-0 ;DWG 146A7500 AND DWG 147A7500.;[10] UPDATED MEASUREMENTS;[11] INSTALLATION OF NEW FLOOR TO SIDEWALL ANGLE IN ACB BS 867 - BS 947; RBL 21 WILL BE ACCOMPLISHED ON CUSTOMER FAULT TTG8Q004GAJV;[12] INSPECTED & VERIFIED CORRECTIVE ACTION ITEMS 10 & 11.

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