Service difficulty report · Pressure Deck · Boeing 7377H4

Difficulty date
July 28, 2021
Submitted
September 15, 2021
Operation
Air carrier
Aircraft
N491WN
Make and model
Boeing 7377H4
Aircraft serial
33867
Aircraft time
53,758 hours, 31,898 cycles
Part
Pressure Deck
Condition
Cracked
Location
Bs 665
Stage of operation
IN
How discovered
V
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

WHILE ACCOMPLISHING CCN:753-201-00-02; FOUND 1 INCH CRACK AT BS 665 RBL 39 WL 203 COMMON TO THE HORIZONTAL PRESSURE DECK. ; / [01] REMOVED ADJACENT STRUCTURES TO GET ACCESS TO THE BEADED PRESSURE DECK WEB BS663-BS674 RBL38-RBL60 WL203 I.A.W SRM 53-40-51-2R-2 PAR.4.A(1); [02] REMOVED DAMAGED PART OF THE WEB FROM BS663-BS674 RBL38-RBL60 WL203 CUT AND REMOVED I.A.W SRM 53-40-51-2R-2 PAR.4.C(3)(A).; [03] HFEC INSPECTED CUT OUT IAW 737 NDTM PART 6 51-00-00 PROCEDURE 23; NO CRACKS NOTED. EQUIP ID#: IS000450 S/N: N500D000M120071; [04] HFEC INSPECTED OPEN HOLES IAW 737 NDTM PART 6 51-00-00 PROCEDURE 16 AND 17; NO CRACKS NOTED. EQUIP ID#: IS000450 S/N: N500D000M120071 EQUIP ID#: ATS2407 S/N: MM1591DD064104; [05] INSPECTED CUTOUT OF BEADED PRESSURE DECK WEB BS663-BS674 RBL38-RBL60 WL203 PER 53-40-51-2R-2 PARA. 4.D.(5) AND 51-10-02-0G-0 NO ADDITIONAL DAMAGE WAS FOUND.; [06] FABRICATED REPAIR PART ITEM 1 DOUBLER (1EA) FROM 2024-T3 0.080' LOT #1461546-1 ITEM;2 STIFFENERS (7EA)FROM BAC1505-100052 7075-T6 LOT #1463897-1 AND ITEM 3 WEB(1EA)FROM 2024-T3 0.063' LOT #1461520-1;LOCATED DRILLED DEBURRED APPLIED CHEMICAL CONVERSION COAT AND PERFORMED ADDITIONAL 0.040 CUT TO THE EDGE OF THE WEB ALL I.A.W SRM 53-40-51-2R-2 PAR.4.D(4);E;FG;H;I AND J AND TABLE 201/REPAIR 2 OK TO PRIME.

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