Service difficulty report · Web · Boeing 7377H4

Difficulty date
August 4, 2021
Submitted
August 23, 2021
Operation
Air carrier
Aircraft
N964WN
Make and model
Boeing 7377H4
Aircraft serial
36965
Aircraft time
32,901 hours, 20,020 cycles
Part
Web
Condition
Corroded
Location
Cargo Threshold
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 SUBTHRESHOLD WEB AT AFT CARGO BAY BS803 TO BS816 RBL26 WL158. ; / [01] REMOVED CORROSION ON ACB SUBTHRESHOLD AT BS 803 - BS816 RBL 26 WL 158 IN 5 EA. AREAS MAX DIMENSION OF 2.5'L X 1.5'W X 0.010' DEEP. ORIGINAL THICKNESS .045'; REMAINING THICKNESS .035' FOUND TO BE OUT OF LIMITS IAW <BR>SRM 53-60-15-1A-1<BR><BR>DEPTH GAUGE ATS1225 S/N UNKNOWN 07/2022; [02] VERIFIED; [03] VERIFIED DAMAGE IS OUT OF LIMITS IAW SRM 53-60-15-1A-1; [04] LOCATED; DRILLED AND DEBURRED NEW SUBTHRESHOLD WEB AT AFT CARGO BAY AT BS 803 TO BS 816 ; RBL 26; WL 158 ; IAW SRM 51-40-05-G0-0 AND DGW 146A8340; [05] VERIFIED LOCATING; DRILLING AND DEBURRING OF NEW SUBTHRESHOLD WEB PER SRM AND DWG.; [06] APPLIED CIC TO AFT CARGO BAY SUBTHRESHOLD LOWER WEB AREA PER MM 51-21-91-620-802 ; AND OK TO INSTALL AFT CARGO BAY THRESHOLD WEB; [07] VERIFIED CIC APPLICATION PER AMM 51-21-91-620-802. OK TO INSTALL THRESHOLD WEB; [08] C-20 SEALANT USED MIXED AT 1:15 PM 9/AUG/21 INSTALLED ALL PERMANENT AND TEMPORY FASTENERS WITH IN SQUEEZE OUT TIME PER SOPM 20-50-19; [09] VERIFIED INSTALLATION OF PERMANENT AND TEMPORY FASTENERS SOPM. (STEP 8); [10] FULLY INSTALLED SUBTHRESHOLD WEB IAW SRM-51-40-02; DWG 146A8340 SH28; [11] VERIFIED FULLY INSTALLED SUBTHRESHOLD WEB IAW SRM-51-40-02; DWG 146A8340 SH28.; [12] VERIFIED ALL STEPS COMPLETE.

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