Service difficulty report · Beam · Boeing 7377H4

Difficulty date
June 15, 2022
Submitted
July 25, 2022
Operation
Air carrier
Aircraft
N478WN
Make and model
Boeing 7377H4
Aircraft serial
33989
Aircraft time
60,197 hours, 35,659 cycles
Part
Beam
Condition
Cracked
Location
R1 Door
Stage of operation
IN
How discovered
C
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

CRACK NOTED ON LOWER BEAM#4 FORWARD SERVICE DOOR UPPER CORNER AREA. EO 5241-C-14093 OR 5241-C-14344 / [01] PARTIALLY DISPLACED INTERNAL SKIN ASSY AT R-1 DOOR FOR REPLACE RIB ACCESS REF USED SRM 51-40-02-0G-0;[02] REMOVED RIB #14 AT R-1 DOOR REF USED SRM 51-40-02-0G-0 AND CARD #5241-C-14093-NG STEP#2.B(1);[03] VERIFIED 1-2.;[04] LOCATED AND DRILLED NEW BEAM#4 AT R-1 DOOR RFE USEWD SRM 51-40-05-0G-0;[05] OK TO TREAT AND PRIME HOLES.;[06] TREATED AND PRIME HOLES AT BEAM AND DOOR SKINS REF USED SRM 51-20-01-0G-0;[07] VERIFIED 6. OK TO INSTALL NEW BEAM.;[08] MIXED BMS 5-95(PR 870C80) BY TIME 11:30 06/29/2022 SQUEEZE OUT BY TIME 17:30 07/02/2022;[09] INSTALLED BEAM AND 90% FASTENERS AT R-1 DOOR BEAM #4 REF USED 51-40-02-0G-0 AND DWG#141A6535;[10] VERIFIED 8-9.;[11] OK TO REINSTALL INNER SKIN ON R1 DOOR.;[12] INSTALLED R-1 DOOR BEAM#4 AND INSTALLED 100% FASTENERS BY SQUEEZE TIME 13:30 06/30/2022 AT R-1 DOOR BEAM #4 REF USED SRM 51-40-02-0G-0 AND DWG#141A6535 & 141A6516;[13] REMOVED AND REPLACED #4 BEAM AT R-1 SERVICE DOOR REF USED SEM 51-40-02-0G-0 AND DWG#141A6535 AND 141A6516 & CARD #TTG8Q001YWJWSTEP 2.B(1);[14] VERIFIED 12-13.

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