Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
November 15, 2021
Submitted
December 13, 2021
Operation
Air carrier
Aircraft
N907WN
Make and model
Boeing 7377H4
Aircraft serial
36619
Aircraft time
45,674 hours, 26,656 cycles
Part
Stiffener
Condition
Cracked
Location
L/H 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

LEFT STABILIZER NR 5 RIB HAS AN HFEC INDICATION OF A CRACK IN THE 3RD STIFFENER FROM THE FRONT. ] CUT OUT DAMAGE IAW SRM 55-10-09-2R-4. COMPLIED WITH THE NDT OF DAMAGE REMOVED IN CORRECTIVE ACTION 1. FOUND FURTHER FLAWS OUTSIDE OF ORIGINAL CUT OUT IAW NDT MANUAL PART 6;51-00-00 PROC.16 AND PART 6;51-00-00 PROC.23. CUT OUT FURTHER FOUND DAMAGE IAW SRM 55-10-09-2R-5. COMPLIED WITH NDT REQUIRED ON CORRECTIVE ACTION 3 IAW NDT MANUAL PART 6, 51-00-00, PROC 23. NO DAMAGED NOTED. NO FURTHER DAMAGE NOTED. NDT COMPLIED WITH ON CORRECTIVE ACTIONS #2 AND #4. HEAT TREATED AND VERIFIED HARDNESS OF MATERIAL IAW SRM 55-10-09-R2-4, TABLE 201, ITEM 2,

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