Service difficulty report · Support Plate · Boeing 7378H4

Difficulty date
April 17, 2023
Submitted
May 16, 2023
Operation
Air carrier
Aircraft
N8534Z
Make and model
Boeing 7378H4
Aircraft serial
63578
Aircraft time
19,732 hours, 9,539 cycles
Part
Support 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

CORROSION AFT CARGO BAY R/H FLOOR TO SIDEWALL SUPPORT PLATE HAS MULTIPLE AREAS AROUND NUT PLATE HOLES BS727E+6' TO BS787 RBL22 WL156< FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING ATS TOOL ID ATS 2473 DUE 08/2023;[02] VERIFIED OUT OF LIMITS PER SRM 53-00-53-1A-2;[03] REMOVED DAMAGED SECTION OF ACB RH FLOOR TO SIDEWALL SUPPORT; BS 727D+13 T0 787. RBL22; IAW SRM 51-40-02-0G-0; SRM 53-00-53-2R-5.;[04] FABRICATED REPAIR PARTS FOR ACB RH FLOOR TO SIDEWALL SUPPORT; BS 727D+13 TO 787; RBL22; MATERIAL; BAC1496-377#7075T62; LOT#1521599-1. APPLIED CHEMICAL CONVERSION COATING; ALL IAW SRM 51-40-02-0G-0; SRM 51-40-05-0G-0; SRM 51-20-01-0G-0; SRM 53-00-53-2R-6. EA M-22-153-01550. AND OK TO PRIME.;[05] VERIFIED CORRECTIVE ACTION #4.<BR>VERIFIED OK TO PRIME REPAIR PARTS.;[06] APPLIED PRIMER TO ALL REPAIR PARTS IAW SRM 53-00-53-2R-6 REPAIR 6;[07] OK TO INSTALL REPAIR PARTS;[08] OKAY TO INSTALL REPAIR PARTS GIVEN.;[09] CORRECTION TO CORRECTIVE ACTION STEPS 4 AND 6. THE CORRECT REPAIR REFERENCE IS SRM 53-00-53-2R-5 REPAIR 5.;[10] INSTALLED REPAIR PARTS PER EA M-22-153-01550 AND SRM 53-00-53-2R-5 REPAIR 5; WITH REPAIR SPLICES AT BS 727B+11' AND BS 727F+11';[11] THE DAMAGE WAS REPAIRED PER SRM 53-00-53-2R-5 (REPAIR 5) AND EA M-22-153-01550;[12] VALIDATED APPLICABILITY OF SRM 53-00-53-1A-2 AND SRM 53-00-53-2R-5;[13] VERIFIED CORRECTIVE ACTIONS; 6; 9; AND 12.;[14] VERIFIED MEASUREMENT TABLE.;[15] VERIFIED STEPS 10 AND 11

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