Service difficulty report · Seat Track · Boeing 7377H4

Difficulty date
June 15, 2021
Submitted
July 16, 2021
Operation
Air carrier
Aircraft
N489WN
Make and model
Boeing 7377H4
Aircraft serial
33855
Aircraft time
54,253 hours, 32,244 cycles
Part
Seat Track
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 TOP AND IN WELL OF SEAT TRACK CROWN BS 500D+7-520 LBL 25 WL 208. ; / [01] REMOVED CORROSION ON TOP AND IN WELL OF SEAT TRACK CROWN STA 500D+7-520; LBL 25; WL 208. MAX MATERIAL REMOVED WAS .034' .5' BY 1' ON TOP AND .007' 1' BY 1' IN WELL. OUT OF LIMITS PER SRM 53-00-52-1A-1; SRM 51-10-02-0G-0. MEASURED DEPTH WITH DIAL DEPTH GAUGE ID# ATS1225; S/N UNKNOWN; EXPIRES 04/2022; [02] VERIFIED REMOVED CORROSION ON TOP AND IN WELL OF SEAT TRACK CROWN STA 500D+7-520; LBL 25; WL 208. MAX MATERIAL REMOVED WAS .034' .5' BY 1' ON TOP AND .007' 1' BY 1' IN WELL. OUT OF LIMITS PER SRM 53-00-52-1A-1; SRM 51-10-02-0G-0. MEASURED DEPTH WITH DIAL DEPTH GAUGE ID# ATS1225; S/N UNKNOWN; EXPIRES 04/2022; [03] SEAT TRACK 540-727B; LBL 25; WL 208 WENT OUT OF LIMITS AND WAS REPLACED ON JOB CARD TTG8Q005G35V;[06] REMOVED DAMAGED SEAT TRACK STA 480-520; LBL 25; WL 208 PER SRM 51-40-02-0G-0.; [07] SEAT TRACK FABRICATED IN ACCORDANCE WITH BOEING DRAWING 453A1610; REV C; ATSHFAB-100-301; REV D.; [08] SEAT TRACK FABRICATED IN ACCORDANCE WITH BOEING DRAWING 453A1610; REV C; REFER TO ATS BUILD RECORD# ATSHFAB-100-301; REV D.;[12] VERIFIED LOCATION; AND DRILL AND COUNTERSUNK NEW SEAT TRACK STA 480-520; LBL 25; WL 208 PER SRM 51-40-02-0G-0; SRM 51-40-05-0G-0; SRM 51-40-08-0G-0; DWG# 143A5300; REV A. OK TO INSTALL; [13] INSTALLED NEW SEAT TRACK AT BS 480-520 LBL25 WL 208 PER SRM 51-40-02-0G-0 AND DWG#143A5300;REV A;

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