Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
October 1, 2021
Submitted
November 17, 2021
Operation
Air carrier
Aircraft
N774SW
Make and model
Boeing 7377H4
Aircraft serial
27882
Aircraft time
69,284 hours, 41,071 cycles
Part
Stiffener
Condition
Cracked
Location
R/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

RIGHT HORIZONTAL STAB INSPAR RIB 4, HSS 120.30. STIFFENER 4 LOWER AREA CRACKED. REMOVED CRACK IAW SRM 55-10-09-2R REPAIR 4. HFEC INSP IAW NDT P6 51-00-00 PROC.23 CRACK NOTED. ROTO INSP IAW NDT P6 51-00-00 PROC.16 CRACK NOTED. REMOVED CRACK ON WEB & HOLE IAW SRM 55-10 09-2R, REPAIR 5. SURFACE ROUGHNESS OF 63 MICROINCHES RA ON CUT EDGES & ROUGHNESS OF 125 MICROINCHES RA ON PART IAW SRM 55-10-09-2R REPAIR 5. FABRICATED NEW ANGLE.IAW SRM 55-10-09-2R REPAIR 5. LOCATED & DRILLED NEW REPAIR IAW SRM 51-40-05-0G-0. FABRICATED FILLER IAW SRM 55-10-09-2R REPAIR 5. TREATED & PRIMED NEW REPAIR ANGLE IAW AMM 51-21-41-370-801 & AMM 51-21-72-370-804. INSTALLED REPAIR IAW SRM 51-40-02-0G-0 & SRM 55-10-09-2R-5 REPAIR 5.

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