Service difficulty report · Frame · Boeing 7377CT

Difficulty date
August 12, 2021
Submitted
September 21, 2021
Operation
Air carrier
Aircraft
N570WN
Make and model
Boeing 7377CT
Aircraft serial
33657
Aircraft time
58,630 hours, 29,455 cycles
Part
Frame
Condition
Cracked
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

FWD CAB BS 311 FRAME CRACKED ABOVE L-1 DOOR FWD UPPER CUT-OUT ..MKD 126-6. ; / REMOVED DAMAGED AREA IN REFERENCE B-737 SRM 53-10-07-2R-1 PERFORMED HFEC ON REPAIR CUTOUT AT FWD CABIN BS 311 FRAME ABOVE L-1 DOOR FWD UPPER CUT-OUT IAW NDTM PART 6;51-00-00 PROCEDURE 23. NO CRACKS] FORMED ANGLE REPAIR FROM MATERIAL 2024 7075-0 .063 CLAD AND STAR HEAT TREATMENT PROCESS TO 2024- 7075 T6 IN REFERENCE B-737 SRM 53-10-07-2R REPAIR #1TRIMMED NEW ANGLE REPAIR; LOCATED AND DRILLED FASTENERS HOLES; IN REFERENCE 53-10-07-2R; TREATED AND PRIMER IN REFERENCE SOPM 20-43-03 AND 20-41-02; [12] VERIFIED 9; 10; 11.<BR>OK TO INSTALL; INSTALLED ANGLE REPAIR AT STA 312 ABOVE L-1 DOOR IN REFERENCE 53-10-07-2R-1 WITH SEALANT BMS 5-95 BETWEEN MATING SURFACE IN REFERENCE 51-20-05; APPLIED FILLET SEAL AROUND THE EDGES IN REFERENCE 51-20-05; AND APPLIED BMS 3-23 TYPE II CORROSION INHIBITING COMPOUND IN REFERENCE 51-20-01

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