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+5; BS727A+10; BS727B+2-BS727C+14; BS727D+2; BS727D+8-BS767 RBL22<[01] PARTIAL STEPS #1- 7.;[02] VERIFIED APPLICABILITY SRM 53-60-53-0I-2 IDENTIFICATION 2 AND SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2.;[03] CORRECTED STEP# 5 WL156.;[04] VERIFIED STEPS 1-7 AND CORRECTIVE ACTION 2.;[05] RECEIVED EXTRUSION BAC1496-377 LOT. 1515191-1.<BR>LOCATED AND DRILLED BTW. BS 727 - BS 767 RBL 23 WL 156 IAW SRM 51-40-05 AND DWG# 146A7500; DWG# 146A7502 REV: A.<BR>OK TO APPLY TREAT AND PRIME.;[06] VERIFIED CORRECTIVE ACTION STEP 5.VERIFIED OK TO TREAT AND PRIME.;[07] APPLIED CHEMICAL CONVERSION COATING AND PRIMER ON NEW FLOOR TO SIDEWALL SUPPORT AND INSTALLED NUT PLATES IAW SRM 51-20-01 AND SOPM 20-41-02. AND SRM 51-40-02 AND DWG# 146A7502 REV:A;[08] VERIFIED CORRECTIVE ACTION STEP 7. VERIFIED MEASUREMENT TABLE AND TASK CARD COMPLETE.

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