Service difficulty report · Support · Boeing 7377H4

Difficulty date
March 9, 2022
Submitted
April 11, 2022
Operation
Air carrier
Aircraft
N468WN
Make and model
Boeing 7377H4
Aircraft serial
33858
Aircraft time
58,378 hours, 34,580 cycles
Part
Support
Condition
Corroded
Location
Aft Cargo
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 ACB FLOOR TO SIDEWALL SUPPORT FROM STA 727B+10 TO STA 767; WL 156; RBL 22 / [01] EVALUATED CORROSION ON FLOOR TO SIDEWALL SUPPORT AT ALL LOCATIONS; FOUND DEEPEST LOCATION TO BE BS 727E+10 RBL 22 WL 156; FOUND 0.015 REMOVED FROM ORIG 0.040 IN 1'X1' AREAS; FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING DIAL DEPTH GAUGE ATS 2473;[02] VERIFIED CORRECTIVE ACTION #1;[03] LOCATED AND DRILLED NEW ACB FLOOR TO SIDEWALL SUPPORT BS727 TO BS767; RBL 22; WL 156. PER DWG 146A7500 AND SRM 51-40-05-0G-0;[04] INSPECTED & VERIFIED CORRECTIVE ACTION ITEM 3.;[05] ADDED ASSIGNED PART REQUIREMENT.;[06] VERIFIED FAULT TTG8Q00B7JX3 IS COMPLETE. ACB FLOOR TO SIDEWASLL SUPPORT WILL BE INSTALLED ON TTG8Q004FHTH.

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