Service difficulty report · Doubler · Boeing 737*

Difficulty date
September 7, 2021
Submitted
November 9, 2021
Operation
Air carrier
Aircraft
N783SW
Make and model
Boeing 737*
Aircraft serial
29809
Aircraft time
68,060 hours, 40,258 cycles
Part
Doubler
Condition
Corroded
Location
Fuselage
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

CRACK INDICATIONS OBTAINED EMANATING FROM FASTENER HOLE OPPOSITE FITTING LATCH AT R1 DOOR CUTOUT STA 294.5 BETWEEN S-8R AND S-9R. THERE ARE 2 CRACKS (1) LENGTH 0.197' AND (2) 0.118' ; / [01] INSTALLED EWIS PROTECTION AT RT FUSELAGE REPAIR AREA REF BI37-7 AMM 20-60-07-913-801; [02] REMOVED 2EA RAIN GUTTER AT RT FUSELAGE REPAIR ACCESS REF B737-7 SRM 53-10-01-2R-6 STEP 4.A; [10] CUT AND REMOVE THE DAMEGED INNER BEARSTRAP REF B737-7 SRM 53-10-01-2R-6STEP 4.C(1)(2); [11] VERIFIED STEP 10; [12] PERFORMED HFEC INSP. ON R1 DOOR CUTOUT STA 294.5 BETWEEN S-8R AND S-9R IAW B737 NDT PART 6 51-00-00 PROC. 23. NO CRACKS. EQUIP: NORTEC 600 CAL DUE: 10/21 B/C 166317; [13] PERFORMED COUNTERSINK ROTO INSP. ON EXISTING FASTENER HOLES @ FWD GALLEY DOOR (R1) BEAR STRAP; BS 290-296 BETWEEN S-8R AND S-9R IAW B737 NDT PART 6 51-00-00 PROC. 16. NO CRACK. EQUIP: NORTEC 600 B/C 166317 CAL DUE: 10/21.; [14] STARTED FABRICATION REPAIR PARTS; DOUBLER AND TRIPLE R-1 DOOR FUSELAGE SKIN REPAIR REF B737-7 SRM 53-10-01-2R-6 STEP 4.E TABLE 201; [15] VERIFIED STEP 14; [16] FABRICATED SKIN DOUBLER REPAIR MATERIAL USED DOUBLER 2024-T3 0.100'PO#1646552;TRIPLER 2024-T3 0.63' PO#1717744; TRIPLER FILLER 2024-T3 0.63; BEARSTRAP FILLER 2024T3- O.090' PO1727238;REF B737-7 SRM 53-10-01-2R-6 STEP 4.E TABLE 201 FIG 202; [31] INSTALLED SKIN AND BEARSTRAP DOUBLER REPAIR AT RT FUSELAGE R-1 DOOR FWD UPPER AREA REF B737-7 SRM 53-10-01-2R-6 STEP 4;