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 AFT CARGO FLOOR TO SIDEWALL SUPPORT BS887+11 RBL23<[01] SRM 53-60-53-0I-2 IDENTIFICATION AND SRM 53-00-53-1A-2 ALLOWABLE DAMAGE ARE APPLICABLE.;[02] REMOVED CORROSION ON AFT CARGO FLOOR TO SIDEWALL SUPPORT BS887+11 RBL23; MEASURE: L=0.070'; W=0.060'; D=0.005'; ORIGINAL TICKNESS IS 0.040'; REMAINING TICKNESS IS 0.035'; FOUND AREA OUT OF LIMITS; IAW SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2 PARAG.4A (2) DETAIL D FIG.103<BR><BR>TOOL USED: ATS1672; DUE:03/2023.;[03] VERIFIED CORRECTIVE ACTION ITEM 1-2.;[04] RECEIVED EXTRUSION BAC1496-377 LOT. 1503760-1.<BR>LOCATED AND DRILLED BTW. BS 887 - BS 947 RBL 23 WL 156 IAW SRM 51-40-05 AND DWG# 147A7500; DWG# 147A7501 REV: A. <BR>OK TO APPLY TREAT AND PRIME.;[05] VERIFIED CORRECTIVE ACTION STEP 4.;[06] APPLIED CHEMICAL CONVERSION AND PRIMER ON NEW FLOOR TO SIDEWALL SUPPORT IAW SRM 51-20-01 AND SOPM 20-41-02.<BR>OK TO INSTALL NUT PLATES.;[07] VERIFIED CORRECTIVE ACTION STEP 6. VERIIFIED OK TO INSTALL NUTPLATES.;[08] INSTALLED NUT PLATES ON AFT CARGO FLOOR TO SIDEWALL SUPPORT BTW. BS 887 - BS 947 IAW SRM 51-40-02 AND DWG# 147A7501 REV: A. <BR>ALL MAINTENANCE ACTION ARE COMPLETE REQUEST FINAL BUY OFF.;[09] VERIFIED CORRECTIVE ACTION STEP 8. VERIFIED MEASUREMENT TABLE AND TASK CARD COMPLETE.

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