Service difficulty report · Plate · Boeing 7378H4

Difficulty date
October 10, 2022
Submitted
October 31, 2022
Operation
Air carrier
Aircraft
N8507C
Make and model
Boeing 7378H4
Aircraft serial
41531
Aircraft time
20,008 hours, 9,579 cycles
Part
Plate
Condition
Corroded
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

AFT CARGO BAY L/H FLOOR TO SIDEWALL SUPPORT PLATE HAS CORROSION COMMON TO NUT PLATE HOLE BS767+3 LBL22 WL156 / [01] UPDATED MEASUREMENT TABLE FOR PICTURE OF CORROSION ATTACHED;[04] REMOVED DAMAGED SECTION OF FLOOR TO SIDEWALL SUPPORT AT BS 727E+10' TO 847 LBL22 WL 156 IAW SRM 53-00-53-2R-5 REP.5 AND EA M-22-153-01550.;[05] FABRICATED; LOCATED; DRILLED AND APPLIED CHEMICAL CONVERSION COATING AND PRIMER ON REPAIR PARTS AND REPAIR AREA AT NEW SECTION OF FLOOR TO SIDEWALL SUPPORT AT BS 727E+10' TO 847 LBL22 WL 156 IAW SRM 53-00-53-2R-5 REP.5 AND EA M-22-153-01550. REPAIR SPLICE 2EA LOCATED AT BS 727E+10' AND 747+7'; MATERIAL USED FOR REPAIR PARTS BAC1496-377 7075T62 LOT#1503760-1.;[06] VERIFIED CORRECTIVE ACTION 5;[07] OK TO INSTALL REQUEST.;[08] OKAY TO INSTALL NEW SIDEWALL SUPPORT GIVEN.;[09] INSTALLED REPAIR PARTS OF FLOOR TO SIDEWALL SUPPORT AT BS 727E+10' TO 847 LBL22 WL 156 IAW SRM 53-00-53-2R-5 REP.5 AND EA M-22-153-01550 AND DWG 146A7500. REPAIR SPLICE 2EA LOCATED AT BS 727E+10' AND 747+7'.;[10] THE DAMAGE WAS REPAIRED PER SRM 53-00-53-2R-5 (REPAIR 5) AND EA M-22-153-01550.;[11] VERIFIED CORRECTIVE ACTION STEPS 9 AND 10.;[12] TASK CARD COMPLETE.

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