Service difficulty report · Fitting · Boeing 7377H4

Difficulty date
September 8, 2022
Submitted
November 15, 2022
Operation
Air carrier
Aircraft
N224WN
Make and model
Boeing 7377H4
Aircraft serial
32493
Aircraft time
56,537 hours, 33,806 cycles
Part
Fitting
Condition
Cracked
Location
Bs 663
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

DUE TO CRACK FINDING IN THE L/H BS 663 FRAME FITTING; THE R/H FRAME FITTING IS BEING REPLACED (PICKLE FORK) PN 144A2400-38. ASSY P/N 144A2400-36#B / [01] STARTED REMOVE FASTENERS RH FRAME STA 663 LH IAW B737-700 SRM 51-40-02;[02] VERIFIED ACTION 1;[03] REMOVED LH UPPPER PICKLE FORK SPLICE INBD PLATE; FWD PICKLE FORK WEB PLATE; INBD FWD AND AFT SPLICE STRAPS IAW SRM 51-40-02;[04] REMOVED RH PICKLE FORK IAW SRM 51-40-02-0G-0;[05] VERIFIED ACTION 4;[06] ACCOMPLISHED OPEN HOLE HFEC IAW B737 NDT P6 51-00-00 P16<BR><BR>ACCOMPLISHED COUNTERSINK HFEC IAW B737 NDT P6 53-30-00 P3<BR><BR>TOOL 36303 DUE 16DEC22<BR>NO CRACKS NOTED;[07] RECIEVED SHIM P/N 11A0150-19 MILLED TO .160' FROM BACKSHOP W/O# 44141-0000-0007 IAW BOEING DWG 110A0150 REV B.;[08] VERIFIED STEP 7 <BR>OK TO TREAT AND PRIME;[09] APPLIED CHEMICAL CONVERSION AND PRIMER TO -19 SHIM IAW AMM 51-21-41-370-803 AND AMM 51-21-72-370-804 AND BOEING DWG # 11A10150 REV B.;[10] VERIFIED STEP 9 C/W;[11] LH UPPPER PICKLE FORK SPLICE INBD PLATE; FWD PICKLE FORK WEB PLATE; INBD FWD AND AFT SPLICE STRAPS REMOVED IN STEP 3 ARE REMOVED AND INSTALLED ON FAULT TTG8Q00EPRK0;[12] VERIFIED STEP 11 C/W;[13] REFER TO EA 22-153-02730 SUMMARY REQUIREMENT; BARCODE: TTG8Q00FGKJE;[14] 'REPLACED THE RH STA 663.75 FRAME FITTING (PICKLE FORK) PER EA 22-153-02730;[15] VERIFIED STEP 14;[16] REPLACED THE RH STA 663.75 FRAME FITTING (PICKLE FORK) PER EA 22-153-02730;[17] AUDIT C/W

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