Service difficulty report · Seat Track · Boeing 7377H4

Difficulty date
June 7, 2023
Submitted
June 29, 2023
Operation
Air carrier
Aircraft
N960WN
Make and model
Boeing 7377H4
Aircraft serial
36675
Aircraft time
38,108 hours, 23,248 cycles
Part
Seat Track
Part number
UNKNOWN
Condition
Cracked
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

CRACKED SEAT TRACK FASTENER AT PASSENGER CABIN BS727B LBL45 WL208. FWD FASTENER.<[01] UPDATED MEASUREMENTS TABLE AND STEP 1.;[02] CERTIFIED CORRECTIVE ACTION 1 AND STEP 1 PARTIAL;[03] UPDATED MEASUREMENTS TABLE;[04] VERIFIED MEASUREMENT TABLE;[05] REMOVED CABIN SEAT TRACK LBL45 W208 BS727B-887 PER SRM 51-40-02-0G-0.;[06] RECEIVED NEW SEAT TRACK FROM O.S.S; ENSURED IT CONFORMS TO DWG# 146A5350 REV-; REFER TO ATS BUILD RECORD 779554-CSD;;[17] LOCATED; DRILLED; COUNTERSUNK; REAMED; AND INSTALLED A BACB30LX8A* OVERSIZED BOLT AS SHOWN IN FIGURE 1-1 ON EA 23-153-01875 AS PER 737-700 SRM 51-40-02:<BR>INSTALLED ALL BOLTS WET WITH BMS 5-95 SEALANT IN CLASS I HOLES PER 737-700 SRM 51-40-05 FIGURE 6/GENERAL; TABLE B.<BR>INSTALLED ALL PRODUCTION FASTENERS WITH 1.7D MINIMUM EDGE MARGIN; UNLESS OTHERWISE DETAILED IN FIGURE 1-1 ON EA 23-153-01875. SEE FAULT TTG8Q00LK5KM FOR DETAILS.<BR><BR>UPDATED STEPS 2-9.;[18] CHANGED STEPS 2-9 FROM COMPLETE TO PENDING FOR Q.C. VERIFICATION.;[19] PARTIAL UPDATE FOR STEPS 1 AND 10;[20] VERIFIED STEPS 1 AND 10.;[21] VERIFIED CORRECTIVE ACTION 17.;[22] STEPS 2-9 CHANGED STATUS FROM PENDING TO PARTIAL; AND ADDED TOOLING ID; AND UPDATED STEPS 1 AND 10.;[23] VERIFIED STEPS 1-10.;[24] TASK COMPLETE.;[25] WORK ACCOMPLISHED PER EA 23-153-01859 IN CONJUNCTION WITH FAULT TTG8Q00LK5KM AND EA 23-153-01875;[26] VERIFIED CORRECTIVE ACTION 25

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