Service difficulty report · Angle · Boeing 7377H4

Difficulty date
March 24, 2022
Submitted
May 3, 2022
Operation
Air carrier
Aircraft
N424WN
Make and model
Boeing 7377H4
Aircraft serial
29828
Aircraft time
66,349 hours, 39,132 cycles
Part
Angle
Condition
Cracked
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 FRONT SPAR FITTING FIX LEADING EDGE SPRING ANGLE; AT LOWER EDGE CRACKS NOTED ON TWO AREAS. / REMOVED DAMAGE SPRING ANGLE AT VERTICAL FIN FRONT SPAR FITTING FIX LEADING EDGE IAW B737-700 51-40-02-0G-0.;[03] VERIFIED STEPS #1 AND #2.;[04] LOCATED AND DRILLED NEW SPRING ANGLE AT VERTICAL FIN FRONT SPAR FITTING FIX LEADING EDGE IAW B737-700 SRM 51-40-05-0G-0.;[05] VERIFIED STEP #4.;[06] OK TO TREAT AND PRIME DRILLED HOLES.;[07] TREATED AND PRIMED DRILLED HOLES AT NEW SPRING ANGLE AT VERTICAL FIN FRONT SPAR FITTING FIX LEADING EDGE IAW B737-700 SRM 51-20-01-0G-0.;[08] OK TO INSTALL NEW REPLACEMENT SPRING ANGLE.;[09] PARTIAL INSTALLED NEW SPRING ANGLE AT VERTICAL FIN FRONT SPAR FITTING FIX LEADING EDGE IAW B737-700 SRM 51-40-02-0G-0 AND DWG # 176A3101.;[10] (RII) VERIFIED PARTIAL SPRING ANGLE INSTALLATION STEP #9.;[11] INSTALLED NEW SPRING ANGLE AT VERTICAL FIN FRONT SPAR FITTING FIX LEADING EDGE IAW B737-700 SRM 51-40-02-0G-0 AND DWG # 176A3101.;[12] REMOVED EWIS PROTECTION AT VERTICAL FIN FRONT SPAR FITTING FIX LEADING EDGE IAW B737-700 AMM 20-60-07-913-801.;[13] (RII) VERIFIED STEP #1; SPRING ANGLE INSTALLED.;[14] VERIFIED STEP #12.;[15] CHANGE INFORMATION ENTER IN ERROR IN STEP #13.<BR> (RII) VERIFIED STEP #11; SPRING ANGLE INSTALLED.;REMOVED AND REPLACED SPRING ANGLE AT VERTICAL FIN FRONT SPAR FITTING FIX LEADING EDGE IAW B737-700 SRM 51-40-02-0G-0 AND DWG # 176A3101.

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