Service difficulty report · Seat Track · Boeing 7377H4

Difficulty date
January 11, 2023
Submitted
February 10, 2023
Operation
Air carrier
Aircraft
N279WN
Make and model
Boeing 7377H4
Aircraft serial
32532
Aircraft time
52,335 hours, 31,548 cycles
Part
Seat Track
Condition
Corroded
Location
Zn 100 Fus Lower
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

MAIN CABIN CORROSION AT SEAT TRACK CROWN TOP RBL 24.75 STA 380+1'<[01] REMOVED CORROSION AT MAIN CABIN SEAT TRACK CROWN TOP RBL 24.75 STA 380+1' AS PER SRM 51-10-02;[02] MATERIAL REMOVED AT TOP CROWN: 0.032'; FOUND OUT OF LIMITS AS PER SRM 53-00-52-1A-1; FIG. 103.;[03] REMOVED FASTENERS AS REQUIRED AT SEAT TRACK RBL 24.75 STA. 380+1'' PER REF SRM 51-40-02-0G-0;[04] CUT & REMOVED THE DAMAGED PART OF THE SEAT TRACK BETWEEN STA 400 - 420. CUT THE WEB & THE LOWER HORZ. FLANGES OF INITIAL SEAT TRACK WHERE THE SPLICE WILL BE MADE; AS PER SRM 53-00-52-2R-4 REPAIR 4; FIG.202.;[05] STARTED FABRICATION THE NEW SEAT TRACK SECTION FROM EXTRUSION BAC1520-2789 7178-T6511; AS PER SRM 53-00-52-2R-4 REPAIR 4;[17] RE-LOCATED & RE-INSTALLED SEAT TRACK FROM STA 420- STA 460 RBL 24.75 DISPLACED ON STEP 11; REF SRM 53-00-52-2R-4 REPAIR 4;[18] RE-LOCATED & RE-INSTALL FASTENERS OF PULLEY BRACKET AT STA 400 RBL 24.75 X3 (HI LOK); DISPLACED ON STEP #10; REF SRM 51-40-02-0G-0.;[19] VERIFIED STEPS 16-17;[20] TASK C/W

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