Service difficulty report · Bear Strap · Boeing 7377CT

Difficulty date
July 14, 2021
Submitted
September 2, 2021
Operation
Air carrier
Aircraft
N7821L
Make and model
Boeing 7377CT
Aircraft serial
32748
Aircraft time
58,592 hours, 29,340 cycles
Part
Bear Strap
Condition
Cracked
Location
Bs 294 S8r
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 FOUND AT INTERNAL MAIN CABIN BEAR STRAP STA 294.5 JUST BELOW STR 8-R; CRACK LENGTH :1.496' / [01] INSTALLED EWIS PROTECTION AS PER 0-60-07-913-801; [02] REMOVED FASTENERS FOR ACCESS PER SRM 51-40-02; [03] PERFORMED HFEC INSP ON CUT OUT AT INTERNAL MAIN CABIN BEAR STRAP STA 294.5 JUST BELOW STR8-R. IAW B 737 NDT PART 6 51-00-00 PROCE 23. TOOL USED NORTEC 600. BC 166317. CALIB DUE 10-12-21. NO CRACKS FOUND.; [04] PERFORMED HFEC ROTATORY INSP ON OPEN FASTENER HOLES AT INTERNAL MAIN CABIN BEAR STRAP STA 294.5 JUST BELOW STR8-R. IAW B 737 NDT PART 6 51-00-00 PROCE 16. TOOL USED NORTEC 600. BC 166317. CALIB DUE 10-12-21. NO CRACKS FOUND.; [05] PERFORMED HFEC COUNTERSUNK INSP ON OPEN FASTENER HOLES AT INTERNAL MAIN CABIN BEAR STRAP STA 294.5 JUST BELOW STR8-R. IAW B 737 NDT PART 6 53-30-00 PROCE 3. TOOL USED NORTEC 600. BC 166317. CALIB DUE 10-12-21. NO CRACKS FOUND.; [06] LATE ENTRY : CUT OUT DAMAGED 2'X1' AT BEAR STRAP STA. 294.5 JUST BELOW STR. 8-R IAW B737-700 SRM 53-10-01-2R-6 REPAIR 6; [28] VERIFIED 25;26;AND 27;COMPLETED; [29] REMOVED EWIS PROTECTION AS PER 20-60-07-913-801; [30] VERIFIED STEP 29. OK TO APPLY TOP COAT; [31] CUT OUT DAMAGED AREA FABRICATED AND INSTALLED REPAIR DOUBLER AND TRIPLER PER SRM 53-10-01-2R-6 REPAIR 6;

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