Service difficulty report · Support · Boeing 7377H4

Difficulty date
October 8, 2021
Submitted
November 19, 2021
Operation
Air carrier
Aircraft
N450WN
Make and model
Boeing 7377H4
Aircraft serial
32470
Aircraft time
58,641 hours, 34,716 cycles
Part
Support
Condition
Corroded
Location
Bs 867-887
Stage of operation
IN
How discovered
V
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

ACB R/H FLOOR TO SIDEWALL SUPPORT BS 867 TO 887 HAS AREAS OF CORROSION ; / [01] EVALUATED CORROSION AT ALL LOCATIONS; FOUND DEEPEST LOCATION TO BE AT BS 874 REMOVED 0.010' IN A AREA OF 1'X1' ORIGINAL THICKNESS 0.040' FOUND TO BE OUT OF LIMITS PER SRM 53-30-15-1A-2 USING ATS TOOL ID ATS1225 S/N UNKNOWN; [02] CORRECTION TO CORRECTIVE ACTION STEP 1 IT SHOULD HAVE STATED ' EVALUATED CORROSION AT ALL LOCATIONS; FOUND DEEPEST LOCATION TO BE AT BS 874 REMOVED 0.010' IN A AREA OF 1'X1' ORIGINAL THICKNESS 0.040' FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING ATS TOOL ID ATS1225 S/N UNKNOWN; [03] VERIFIED CORRECTIVE ACTION 2.; [04] LOCATED AND DRILLED NEW R/H FLOOR TO SIDEWALL SUPPORT BS 867 TO 887 PER SRM 51-40-05-0G-0 AND DWG 146A7500; [05] VERIFIED CORRECTIVE ACTION 4.

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