Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
January 26, 2023
Submitted
March 6, 2023
Operation
Air carrier
Aircraft
N955WN
Make and model
Boeing 7377H4
Aircraft serial
36671
Aircraft time
38,739 hours, 23,607 cycles
Part
Stiffener
Condition
Cracked
Location
Zn 300 Stabilize
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 ON HORIZONTAL STABILIZER RIB STIFFENER AT R/H RIB 5 STAB STA 129.50 2ND FROM FWD.<[01] UPDATE MEASUREMENTS TABLE.;[09] RECEIVED MATERIAL TO FABRICATE REPAIR PARTS FILLER LOT# 143971-1; L-ANGLE LOT# 1474027-1 AND T-SECTION LOT# 1476286-1 PER B737-700 SRM 55-10-09-2R-4 REPAIR 4.;[10] CERTIFY;[11] VERIFIED STEP 9;[12] FABRICATED NEW REPAIR PARTS FILLER; L-ANGLE AND T-SECTION AND LOCATED AND DRILLED NEW REPAIR PARTS FOR R/H INSPAR RIB STIFFENER AT RIB 129.50 PER B737-700 SRM 55-10-09-2R-4 REPAIR 4.[17] VERIFIED CORRECTIVE ACTION #16 OK TO INSTALL;[18] INSTALLED REPAIR PARTS ON HORIZONTAL STABILIZER RIB STIFFENER AT R/H RIB 5 STAB STA 129.50 2ND FROM FWD IAW SRM 55-10-09-2R-4.

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