Service difficulty report · Channel · Boeing 7377Q8

Difficulty date
March 14, 2022
Submitted
April 18, 2022
Operation
Air carrier
Aircraft
N7877H
Make and model
Boeing 7377Q8
Aircraft serial
29359
Aircraft time
50,381 hours, 27,028 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 PASSENGER CABIN MOP SILL AT RBL 63 BS 360+2. UPON FARTHER INVESTIGATION LIGHT CORROSION FOUND AT FSD MOP SILL SPLICE ANGLE / [01] REMOVED CORROSION FROM FSD MOP SILL BS 294+12 TO BS 360+2 RBL55 WL 208.1 IN ARE OF 20' X 1.5' ORIGINAL MATERIAL THICKNESS 0.080' IAW SRM 51-10-02-0G-0;[02] PARTIALLY COMPLETED STEP 1;[03] COMPLETED STEP 1;[04] CORROSION FOUND ON FSD MOP SILL SPLICE ANGLE BS 360+2 RBL63 WL 208.1 FOUND TO BE OUT OF LIMIT DUE TO NO LIMIT ON SRM PARTS WILL BE REPAIRED BY REPLACEMENT IAW SRM 51-10-02-0G-0 PAR. 9C;[05] VERIFIED CORRECTIVE ACTIONS 1-4.;[06] REMOVED FSD MOP SILL SPLICE ANGLE BS 360+2 RBL63 WL 208.1 I.A.W.SRM 51-40-02-0G-0.;[07] RECEIVED NEW FSD MOP SILL SPLICE ANGLE FROM O.S.S MACHINED FROM 7050T7451 LOT # 142684-1 ; DYE PENETRANT INSPECTED ON CUSTOMER R/O # 861201-SWA ; AND ANODIZED ON P/O # 861203-SWA ; LOCATED AND DRILLED IAW SRM 51-40-05 AND DWG # 143A5912 ; OK TO PRIME;[08] VERIFIED CORRECTIVE ACTION #7;[09] APPLIED PRIMER TO THE NEW FSD MOP SILL SPLICE IAW SOPM 20-41-02 ; OK TO INSTALL;[10] VERIFIED CORRECTIVE ACTIONS STEP 9. OK TO INSTALL GIVEN.;[11] INSTALLED THE NEW FSD MOP SILL SPLICE IAW SRM 51-40-02 AND DWG # 143A5900;[12] VERIFIED CORRECTIVE ACTION #11;[13] JOB COMPLETE

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