Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
January 13, 2021
Submitted
February 1, 2021
Operation
Air carrier
Aircraft
N276WN
Make and model
Boeing 7377H4
Aircraft serial
32530
Aircraft time
46,426 hours, 27,849 cycles
Part
Stiffener
Condition
Cracked
Location
Lh Horiz. Stab
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

HORIZONTAL STAB INSPAR NR 5 AT STAB STA 129.50 STIFFENER NR 3 LOWER SECTION CRACKED. ACCOMPLISHED REPAIR FOR HORIZONTAL STAB RIB NR 5 AT STIFFENER NR 3 LOWER SECTION AS PER REF B737-7 SRM 55-10-09-2R-4. PERFORMED NDT AFTER REWORK; NO FURTHER CRACKS NOTED IAW B737 NDT PART 6 51-00-00 PROC 23. TREATED AND PRIMED AREA OF REPAIR AS PER B737-7 AMM 51-00-58-201 AND 51-21-72-370-803.

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