Service difficulty report · Frame · Boeing 7377H4

Difficulty date
November 4, 2021
Submitted
December 20, 2021
Operation
Air carrier
Aircraft
N778SW
Make and model
Boeing 7377H4
Aircraft serial
27883
Aircraft time
68,867 hours, 40,745 cycles
Part
Frame
Condition
Cracked
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 CABIN LT FUSELAGE SUPPORT FRAME FLANGE HAS SMALL CRACK ABOVE L-1 DOOR CUTOUT, BS 312. TRIMMED DAMAGED AREA IAW SRM 53-10-07-2R-1, FIGURE 202. REMOVED FASTENERS AT REPAIR LOCATION IAW SRM 51-40-02-0G-0. PERFORMED HFEC ROTO ON OPEN FASTENER HOLES WITHIN REPAIR AREA IAW NDTM PART 6, 51-00-00 PROCEDURE 16. NO CRACKS. PERFORMED HFEC AT CUT OUT IAW NDTM PART 6, 51-00-00 PROCEDURE 23. NO CRACKS. PERFORMED INSURANCE CUT IAW SRM 53-10-07-2R-1. FABRICATED DOUBLER IAW SRM 53-10-07-2R-1. INSPECTED STEP 7 AND 8. REPAIR DOUBLER HEAT TREATED TO 7075-T6. APPLIED ALODINE AND PRIMER TO REPAIR AND AREA IAW SRM 51-20-01-0G-0. INSTALLED REPAIR IAW SRM 53-10-07-2R-1.

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