Service difficulty report · Floor Support · Boeing 7377H4

Difficulty date
May 13, 2021
Submitted
June 17, 2021
Operation
Air carrier
Aircraft
N732SW
Make and model
Boeing 7377H4
Aircraft serial
27864
Aircraft time
74,727 hours, 43,976 cycles
Part
Floor Support
Condition
Corroded
Location
Bs 927-947 Rbl13
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*** ON INTERCOSTAL AT AFT CARGO BAY BS927- BS947 RBL13 WL172. MARKED ; / INSTALLED NEW ACB INTERCOSTAL BS 927-947; LBL 13; WL 172 IAW SRM 51-40-02-0G-0; DWG# 147A7500;LOCATED; DRILLED; DEBURRED; APPLIED CHEMICAL CONVERSION COATING; AND PRIMED NEW ACB INTERCOSTAL BS 927-947; RBL 13; WL 172 IAW SRM 51-40-05-0G-0; DWG# 147A7500. OK TO INSTALL;RECEIVED FABRICATED INTERCOSTAL FROM OSS PO# 824879;VERIFIED DRILL UP; DEBURRING; AND CONVERSION COATING AND PRIMER. OK TO INSTALL.;VERIFIED MEASUREMENT TABLE; INTERCOSTAL FOUND TO BE OUT OF LIMITS AND REPLACEMENT PART PER SRM 51-10-02-0G;VERIFIED RECEIPT OF PART; MATERIAL TYPE/ THICKNESS/ TEMPER;EVALUATED CORROSION ON INTERCOSTAL BS927 TO BS947 RBL13 WL172 FOUND TO BE OUT OF LIMITS DUE TO NO ALLOWABLE LIMITS IN THE SRM AND REQUIRES REPLACEMENT PER SRM 51-10-02-0G-0;REMOVED INTERCOSTAL AT BS 947-927 RBL 13 W172 IAW SRM 51-40-02-0G-0;UPDATED MEASUREMENT TABLE;VERIFIED INSTALLATION OF NEW ACB INTERCOSTAL BS 927-947; LBL 13; WL 172 IAW SRM 51-40-02-0G-0; DWG# 147A7500

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