Service difficulty report · None · Boeing 737

Difficulty date
August 18, 2022
Submitted
September 22, 2022
Operation
Air carrier
Aircraft
N489WN
Make and model
Boeing 737
Aircraft serial
33855
Aircraft time
57,460 hours, 34,246 cycles
Part
None
Condition
Corroded
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; AFT RH MOP SILL; BS 947 TO BS 995 / [01] VERIFIED APPLICABILITY PER SRM 53-70-15-1A-1;[02] REMOVED CORROSION ON ASD R/H MOPSILL BETWEEN BS 947 TO 995. L=10' X W=2' X D=0.014' FOUND TO BE OUT OF LIMITS WITH A REMAINING THICKNESS OF 0.066' OF ORIGINAL THICKNESS OF 0.080'<BR>CORROSION REMOVED IAW SRM 53-70-15-0I-1 AND SRM 53-70-15-1A-1.<BR>TOOL USED:<BR>DIAL DEPTH GAUGE ID: ATS2677; SN: UKNOWN; DATE DUE: 11/2022;[03] REMOVED ASD R/H MOPSILL I.A.W SRM 51-40-02-0G-0;[04] VERIFIED CORRECTIVE ACTION ITEMS 1; 2 AND 3.<BR>CONCUR WITH APPLICABILITY OF SRM 53-70-15-1A-1.<BR>VERIFIED DAMAGE ON ASD R/H MOPSILL BETWEEN BS 947 TO 995. L=10' X W=2' X D=0.014' FOUND TO BE OUT OF LIMITS.;[05] ADDED PN;[06] LOCATED AND DRILLED NEW ASD R/H MOPSILL P/N 147A 8540-8 I.A.W SRM 51-40-05-0G-0 AND DWG. 147A8501. REQ. OK TO INSTALL.;[07] VERIFIED CORRECTIVE ACTION 6.;[08] INSTALLED TEMPORARY AND PERMANENT FASTENERS BEFORE SQUEEZE OUT TIME AT ASD R/H MOP SIL P/N 147A 8540-8 APPLIED PS 870 C20 SEALANT AT 25-AUG-2022 16:25 UTC I.A.W SOPM 20-50-19 AND SRM 51-40-02-0G-0 AND DWG. 147A8501.;[09] VERIFIED CORRECTIVE ACTION 8;[10] VERIFIED CORRECTIVE ACTION #8;[11] VERIFIED MEASUREMENT FIELD;[12] INSTALLED ASD R/H MOP SIL P/N 147A 8540-8; I.A.W SRM 51-40-02-0G-0 AND DWG. 147A8501.;[13] VERIFIED CORRECTIVE ACTION 12;[14] VERIFIED CORRECTIVE ACTION #12.