Service difficulty report · None · Boeing 7377H4

Difficulty date
August 18, 2022
Submitted
September 28, 2022
Operation
Air carrier
Aircraft
N431WN
Make and model
Boeing 7377H4
Aircraft serial
29845
Aircraft time
66,939 hours, 39,408 cycles
Part
None
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

LEADING EDGE PANEL RIB ASSY. #2; CRACK NOTED AT RIVET HOLE (DOT 223-HLE002). / [01] REMOVED RIB ASSY #2 AT LEADING EDGE PANEL AS PER B737-700 SRM 51-40-02-0G-0.;[02] LOCATED AND DRILLED NEW RIB #2 POSITION AT LEADING EDGE R/H HORIZONTAL STABILIZER IN IAW SRM 51-40-02-0G-0 AND DWG# 186A1001;[03] VERIFIED STEPS #1 AND #2; LOCATED AND DRILLED.<BR> OK TO TREAT AND PRIME DRILLED HOLES.;[04] TREATED WITH ALODINE AND PRIMER ALL FASTENERS HOLES OF NEW RIB IN IAW SRM 51-20-01-0G-0 AND 51-21-72-0G-0;[05] VERIFIED STEP #4.;[06] (RII) OK TO INSTALL NEW REPLACEMENT RIB ASSY.;[07] MIXED BMS 5-95 SEALANT AT 1:00 PM; 9/6/22 SQUEEZE OUT TIME BY 3:00 PM;[08] INSTALLED NEW RIB ASSY # 2 AT LEADING EDGE R/H HORIZONTAL STABILIZER IN IAW SRM 51-40-02-0G-0 AND DWG# 186A1001;[09] REMOVED AND REPLACED NEW RIB ASSY # 2 AT LEADING EDGE R/H HORIZONTAL STABILIZER IN IAW SRM 51-40-02-0G-0 AND DWG #186A1001;[10] VERIFIED STEPS #7 AND #8.;[11] (RII) FINAL INSPECTION; REPLACED WITH NEW RIB ASSY. WORK PERFORMED.

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