Service difficulty report · Torque Box · Boeing 737990ER

Difficulty date
January 26, 2023
Submitted
January 27, 2023
Operation
Air carrier
Aircraft
N63890
Make and model
Boeing 737990ER
Aircraft serial
42194
Aircraft time
23,407 hours, 8,460 cycles
Part
Torque Box
Part number
148A8636
Condition
Punctured
Location
Sta 1100
Stage of operation
IN
How discovered
O
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

TORQUE BOX BEAM WEB PUNCTURED AR STA 1100 RBL 11 AND LBL 11. REMOVED 5 EA BRACKETS NEAR DMG ON APU SIDE OF WEB TO FOM REMOVED 1 EA T-EXTRUSION BRACKET NEAR DMG ON JACKSCREW SIDE OF CUT OUT DMG JUST INBD OF R/H ANGLE IAW 51-70-13-2R-1 STEP 4 A. VERIFIED CUTOUT OF DAMAGED AREA PER 51-70-13-2R STEP 4A (LABELED 1-5). WEB TO FOM. ACCOMPLISHED HFEC OF FWD DAMAGE, STA 1100 RBL ONLY. IAW PART 6 VERIFIED MATERIAL I.D. 51-00-00 PROCEDURE 23. NO DAMAGE NOTED AT AREA OF CUTOUT. NDT PERFORM A OPEN HOLE HIGH FREQUENCY EDDY CURRENT (HFEC) TRANSFERED LBL 11 DMG TO LOG PAGE 36384293. MATERIAL ID: -1 DOUBLER, 2024-T3 0.050" P/O 6730169; -2 SHIM PERFOMED HFEC INSPECTION OF CUTOUT AND EXISTING FASTENERS PER ACCOMPLISHED SRM 51-70-13-2R-1 STEPS 4B UP TO AND INCLUDING 4I VERYFIED DOUBLERS IAW SRM 51-70-13-2R-1 STEPS 4B UP TO AND 2024-T3 0.010" P/O 12129875; REPLACEMENT ANGLE, BAC1505-101208 NDT 51-00-00 23,16 NO DEFECTS FOUND. (FABRICATE -1 DOUBLER AND -2 SHIMS) @ RBL 11. INCLUDING 4I 7075-T76511 P/O 6450474 AS PER SRM 51-70-13-2R-1. OK TO INSTALL REPAIR DOUBLER AT STA 1100 RBL11 AND LBL11. NEED INSP OK TO INSTALL DOUBLER AT STA 1100 RBL 11 AND LBL 11 INSTALLED REPAIR DOUBLER AND SHIMS IAW SRM 51-70-13-2R-1 REPAIR 1. VERIFIED INSTALLATION OF REPAIR DOUBLER AND SHIMS.