Service difficulty report · Support Plate · Boeing 7378H4

Difficulty date
February 17, 2022
Submitted
March 3, 2022
Operation
Air carrier
Aircraft
N8681M
Make and model
Boeing 7378H4
Aircraft serial
36904
Aircraft time
20,561 hours, 9,510 cycles
Part
Support Plate
Part number
146A750231
Condition
Corroded
Location
Aft Cargo Bay
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 AFT CARGO BAY L/H FLOOR TO SIDEWALL SUPPORT PLATE BS 727J+14 LBL25 WL156 / [01] EVALUATED CORROSION; BS 727J+14 LBL 25 WL 156; FOUND 0.015 REMOVED FROM ORIG 0.040 IN 1'X1' AREA FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING DIAL DEPTH GAUGE ATS 2473;[02] VERIFIED CORRECTIVE ACTION 1. OUT OF LIMITS;[03] REMOVED DAMAGED SECTION; ACB LH; BS 727J+12; FABRICATED REPAIR PARTS; FOR ACB LH FLOOR TO SIDEWALL SUPPORT BS727J-847 LBL25. IAW SRM 53-00-53-2R-5; APPLIED COMICAL CONVERSION COATING; MATERIAL; BAC1496-377#7075T62; LOT# 1477731-1; IAW SRM 53-00-53-2R-5; SRM53-60-53-01-2; DWG 146A7500.;[04] OK TO PRIME REPAIR PARTS.;[05] VERIFIED APPLICABILITY OF SRM 53-00-53-2R-5;[06] VERIFIED CORRECTIVE ACTIONS 3-5. <BR><BR>OK TO PRIME REPAIR PARTS.;[07] APPLIED PRIMER TO REPAIRS PARTS PER AMM 51-21-72-370-804. OK TO INSTALL;[08] VERIFIED CORRECTIVE ACTION ITEM 7. OK TO INSTALL REPAIR PARTS GIVEN.;[09] INSTALLED ACB FLOOR TO SIDEWALL SUPPORT AT BS 727J+12 - BS847 AND SPLICE REPAIR AT727J+8 -BS727J+16; PER SRM 53-00-53-2R-5; SRM51-40-02-0G-0 AND DWG 146A7500;[10] VERIFIED CORRECTIVE ACTION ITEM 9.;[11] VERIFIED FAULT TTG8Q00AWCXR IS COMPLETE.

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