Service difficulty report · Beam · Boeing 7377H4

Difficulty date
October 4, 2021
Submitted
November 24, 2021
Operation
Air carrier
Aircraft
N780SW
Make and model
Boeing 7377H4
Aircraft serial
27885
Aircraft time
68,861 hours, 40,837 cycles
Part
Beam
Condition
Corroded
Location
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 B.S.270 LATERAL BEAM AT L.B.L 9; L.B.L. 6; L.B.L. 4; R.B.L. 3 AND R.B.L. 9; W.L. 207.54. ; / [01] REMOVED FASTENER ON BS270 RBL9-LBL9 WL208 I.A.W SRM 51-40-02-0G-0; [08] DAMAGE ON BS270 LATERAL BEAM FROM LBL9-RBL9 WL207.5 18'X1' AREA FOUND TO BE OUT LIMITS I.A.W SRM 53-10-51-1A-1 ALLOWABLE DAMAGE 1 FIG 104 GROUP 3 PAR 4.C(2)(A)DETAIL C;E LATERAL BEAM TO BE REPAIRED PER M-21-153-00277 ATTACHED ON COSTUMER CARD TTG8Q006SX2U; [09] INSTALLED 100% TEMPORARY AND PERMANENT FASTENER BEFORE SQUEEZE OUT TIME ON REPAIR AREA BS249-BS270 WL 207.5 RBL10-LBL10 I.A.W SOPM 20-50-19.

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