Service difficulty report · Fitting · Boeing 7377H4

Difficulty date
November 10, 2021
Submitted
January 10, 2022
Operation
Air carrier
Aircraft
N770SA
Make and model
Boeing 7377H4
Aircraft serial
30589
Aircraft time
69,290 hours, 41,022 cycles
Part
Fitting
Condition
Cracked
Location
Vert Stab Spar
Stage of operation
IN
How discovered
V
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 CRACK NOTED. ; / [01] REMOVED FIX LEADING EDGE SPRING ANGLE AT VERTICAL FIN FRONT SPAR FITTING IAW SRM 51-40-02-0G-0.; [02] VERIFIED STEP #1; [03] LOCATED AND DRILLED NEW FITTING FIX LEADING EDGE VERTICAL FIN FRONT SPAR SPRING ANGLE IAW B737-700 SRM 51-40-05-0G-0 AND DWG# 176A3101.; [04] (RII) VERIFIED STEP #3; [05] OK TO INSTALL NEW REPLACEMENT FIX L/E SPRING ANGLE.; [06] MIXED 0870C080BM654SKN40 SEALANT 17:00 12-01-21 SQUEEZE OUT TIME BY 03:00 12-05-21; [07] INSTALLED NEW FITTING FIX LEADING EDGE VERTICAL FIN FRONT SPAR SPRING ANGLE IAW B737-700 SRM 51-40-02-0G-0AND DWG# 176A3101; [08] (FINAL) REMOVED FIX LEADING EDGE SPRING ANGLE AT VERTICAL FIN FRONT SPAR FITTING IAW SRM 51-40-02-0G-0. LOCATED AND DRILLED NEW FITTING FIX LEADING EDGE VERTICAL FIN FRONT SPAR SPRING ANGLE IAW B737-700 SRM 51-40-05-0G-0 AND DWG# 176A3101. INSTALLED NEW FITTING FIX LEADING EDGE VERTICAL FIN FRONT SPAR SPRING ANGLE IAW B737-700 SRM 51-40-02-0G-0AND DWG# 176A3101; [09] (RII) FINAL INSPECTION; FIX L/E SPRING ANGLE REPLACED.

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