Service difficulty report · Shear Tie · Boeing 73779P

Difficulty date
June 24, 2021
Submitted
July 27, 2021
Operation
Air carrier
Aircraft
N7820L
Make and model
Boeing 73779P
Aircraft serial
28253
Aircraft time
52,814 hours, 34,351 cycles
Part
Shear Tie
Condition
Corroded
Location
Bs 727d S25-26r
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

**CORROSION** AFT CARGO BILGE BETWEEN S-25R AND S-26R AT FRAME AT BSTA 727D WITH CORROSION AROUND FASTENER ; / [01] REMOVED FASTENER FOR ACCESS TO COOROSION; PER REF. B737 SRM 51-40-02-0G-0; [02] VERIFIED REMOVED FASTENER FOR ACCESS TO CORROSION; [03] REMOVED EXFOLIATED CORROSION ON SHEAR TIE OF FRAME ; STA: 727D BETWEEN STR-25R AND 26R; AREA OUT OF LIMITS PER REF. B737 SRM 53-00-07-1A-1; FIG. 102 ; DETAIL C; [04] VERIFIED REMOVED EXFOLIATED CORROSION ON SHEAR TIE OF FRAME ; STA: 727D BETWEEN STR-25R AND 26R; AREA OUT OF LIMITS; [05] REMOVED AFT WING TO BODY FAIRING #194HR FOR ACCESS; PER REF. B737 AMM 53-51-21-000-801; [06] VERIFIED PANEL REMOVAL.; [07] REMOVED DAMAGED SHEAR TIE ON AFT CARGO COMP. LOWER STRUCTURE AREA; AT STA: 727D; BETWEEN STR.-25R AND STR.-26R; PER REF. B737 SRM 51-40-02-0G-0; [08] VERIFIED REMOVAL STEP 7.; [09] LOCATED AND DRILLED NEW MACHINE SHEAR TIE AT AFT CARGO COMPARTMENT STA.727D BETWEEN STR.25 AND 26 R; PER REF. 737 SRM 51-40-05-0G-0 [20] REMOVED CORRORED SHEAR TIE AND INSTALLED NEW SHEAR TIE P/N 146A3011-57 ON AFT CARGO STA. 727D; BETWEEN STRINGERS 25 AND 26 R PER REF. 737 SRM 51-40-02-0G-0 AND DRAWING # 146A3011;

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