Service difficulty report · Angle · Boeing 7377H4

Difficulty date
August 21, 2022
Submitted
September 29, 2022
Operation
Air carrier
Aircraft
N431WN
Make and model
Boeing 7377H4
Aircraft serial
29845
Aircraft time
66,939 hours, 39,408 cycles
Part
Angle
Condition
Cracked
Location
Vertical 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

VERTICAL FIN L/E FRONT SPAR FITTING FIX AFT EDGE SPRING ANGLE 2EA. CRACKS NOTED (DOT 223-VLE002). VERTICAL FIN L/E FRONT SPAR FITTING FIX FWD EDGE SPRING ANGLE 2EA. CRACKS NOTED (DOT 223-VLE002). / [01] REMOVED FWD SPRING ANGLE AT VERTICAL FIN L/E FRONT SPAR FITTING FIX AS PER B737-700 SRM 51-40-02-0G-0.;[02] LOCATED AND DRILLED NEW FWD SPRING ANGLE AT VERTICAL FIN L/E FRONT SPAR FITTING FIX AS PER B737-700 SRM 51-40-05-0G-0.;[03] VERIFIED STEPS #1 AND #2; REPLACEMENT FWD SPRING ANGLE LOCATED AND DRILLED.;[04] OK TO TREAT AND PRIME DRILLED HOLES.;[05] APPLIED ALODINE AND PRIMER AT NEW FWD SPRING ANGLE HOLES AT VERTICAL FIN L/E FRONT SPAR FITTING FIX AS PER B737-700 SRM 51-20-01-0G-0; AMM 51-21-72-370-801.;[06] VERIFIED STEP #5.<BR> OK TO INSTALL NEW FWD SPRING ANGLE.;[07] PARTIALLY INSTALLED NEW FWD SPRING ANGLE AT VERTICAL FIN L/E FRONT SPAR FITTING FIX AS PER B737-700 SRM 51-40-02-0G-0; DWG # 176A3001.;[08] (RII) VERIFIED STEP #7; FWD SPRING ANGLE PARTIALLY INSTALLED.;[09] COMPLETED INSTALLATION OF FWD SPRING ANGLE AT VERTICAL FIN L/E FRONT SPAR FITTING FIX AS PER B737-700 SRM 51-40-02-0G-0; DWG # 176A3001;[10] REMOVED AND REPLACED FWD SPRING ANGLE AT VERTICAL FIN L/E FRONT SPAR FITTING FIX AS PER B737-700 SRM 51-40-02-0G-0; DWG # 176A3001;[11] VERIFIED STEPS 9 AND 10

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