Service difficulty report · Support · Boeing 73776Q

Difficulty date
January 11, 2023
Submitted
February 16, 2023
Operation
Air carrier
Aircraft
N565WN
Make and model
Boeing 73776Q
Aircraft serial
30282
Aircraft time
56,383 hours, 37,305 cycles
Part
Support
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

CORR0SION FLOOR TO SIDEWALL SUPPORT BS727+15-BS727A+2; BS727A+10-BS727B; BS727C+2-BS727C+10; BS727D+2-BS727D+8; BS727E+6-BS767+8 LBL22<[01] PARTIAL STEP 1TO 10;[02] VERIFIED APPLICABILITY OF SRM 53-00-53-1A-2 ALLOWABLE DAMAGE;[03] VERIFIED STEPS 1-10 AND CORRECTIVE ACTION 2.;[04] VERIFIED MEASUREMENT TABLE.;[05] FABRICATED;LOCATED AND DRILLED NEW FLOOR TO SIDEWALL SUPPORT AT LBL22;BS727 TO BS847;AND SPLICE SIDEPLATE BETWEEN BS727E-BS747;MATERIAL USED BAC1496-377#7075T62;LOT#1508577-1;IAW SRM 53-00-53-2R-5 REPAIR 5 FIG 202;SRM 51-40-05 AND DGW#146A7502 REV.A.OK TO TREAT AND PRIME.;[06] VERIFIED CORRECTIVE ACTION STEP 5. VERIFIED OK TO TREAT AND PRIME.;[07] APPLIED CHEMICAL CONVERSION COATING AND PRIMER ON FLOOR TO SIDEWALL AT ACB LBL22;BS727 TO BS847.- IAW 737-700; AMM 51-21-72-370-804; AMM 51-21-41-370-802. OK TO INSTALL ZEE CHANNEL SIDEPLATES AND SPLICE SIDEPLATE.;[08] VERIFIED CORRECTIVE ACTION 7. OK TO ASSEMBLE L/H FLOOR TO SIDEWALL SUPPORT;[09] INSTALLED NUT PLATES ON FLOOR TO SIDEWALL SUPPORT BTW BS 727 - BS 847 LBL22 IAW SRM 51-40-02 & DWG# 146A7502 REV: A.<BR>INSTALLED SPLICE SIDE PLATE LOCATED BTW. BS 727E - 747 IAW SRM 53-00-53-2R-6 REPAIR 6 TABLE 201 ITEM [2].;[10] VERIFIED CORRECTIVE ACTION 9.

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