Service difficulty report · Seat Track · Boeing 7377H4

Difficulty date
June 17, 2021
Submitted
July 14, 2021
Operation
Air carrier
Aircraft
N226WN
Make and model
Boeing 7377H4
Aircraft serial
32494
Aircraft time
53,110 hours, 31,655 cycles
Part
Seat Track
Condition
Corroded
Location
Bs 773
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 RAIL AT BS 773 LBL 2.5 WL 156 ; / [01] EVALUATED CORRODED AREA ON RAIL AT BS 773 LBL 2.5 WL 156; <BR>AND FOUND TO BE OUT OF LIMITS DUE TO EXCEED ALLOWABLE DAMAGE LIMITS IAW SRM 53-00-53-1A-2 PART 4A(2) DETAIL 'D'; MEASURES L=2.1 X W=0.9 X D= 0.016'' FROM ORIGINAL THICKNESS OF TH=0.063'' TOOL USED DIAL DEPTH GAUGE P/N 643JZ(ATS400); PIN POINT MICROMETER P/N 112-225(ATS1671) S/N 65093024; [02] EVALUATED CORRODED AREA ON RAIL AT BS 773 LBL 2.5 WL 156; <BR>AND FOUND TO BE OUT OF LIMITS DUE TO EXCEED ALLOWABLE DAMAGE LIMITS IAW SRM 53-00-53-1A-2 PART 4A(2) DETAIL 'D'; MEASURES L=2.1 X W=0.9 X D= 0.016'' FROM ORIGINAL THICKNESS OF TH=0.063''. FOUND TO BE OUT OF LIMITS DUE TO EXCEED ALLOWABLE DAMAGE LIMITS IAW SRM 53-00-53-1A-2 STEP 4. A. (2) DETAIL 'D'; MEASURES L=2.1 X W=0.9 X D=0.016'' FROM ORIGINAL THICKNESS OF TH=0.063''. VERIFY SRM 53-00-53-2R-2 REPAIR 2; IS APPLICABLE TO THIS A/C. REMOVED DAMAGE CUT OUT THE UPPER FLANGE ON RAIL AT BS 773 LBL 2.5 WL 156 IAW SRM 53-00-53-2R-2 REPAIR 2. LOCATED AND DRILLED NEW SPLICE REPAIR ON RAIL AT BS 773 LBL 2.5 WL 156 IAW SRM 53-00-53-2R-2 ALTERNATIVE 5.

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