Service difficulty report · Stringer Clip · Boeing 73779P

Difficulty date
June 25, 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
Stringer Clip
Condition
Corroded
Location
Bs 500b-S28r
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'' FWD CARGO COMP BILGE AREA STGR CLIP WITH EVIDENCE OF SURFACE CORROSION AT FRAME BS 500B AND STGR 28R. ; / [01] REMOVED FASTENERS AT STR CLIP STA 500B STR 28R REF B737-7 SRM 51-40-02-0G-0; [02] REMOVED CORROSION AT STR CLIP STA 500B STR 28R ORIGINAL MAT 0.032 MAT LOSS 0.010 MAT REMAINING 0.022 FOUND OUT OF LIMITS REF B737-7 SRM 51-10-02-0G-0 AND 53-00-53-1A-2 DETAIL C FIG 103; [03] LOCATED AND DRILLED NEW STR CLIP AT STA 500B STR 28R REF B 737-7 SRM 51-40-05-0G-0; [04] VERIFIED STEPS 2& 3; [05] OK TO TREAT AND PRIME HOLES; [06] TREATED AND PRIME HOLES AT NEW CLIP REF B737-7 SRM 51-20-01-0G-0; [07] VERIFIED STEP 6; [08] OK TO INSTALL NEW CLIP; [09] INSTALLED NEW STR CLIP AT STA 500B STR 28R REF B737-7 SRM 51-40-02-0G-0; [10] REMOVED AND REPLACED NEW STR CLIP AT FWD CARGO COMP. STA 500B STR 28R REF B737-7 SRM 51-40-02-0G-0; [11] REMOVED AND REPLACED STR CLIP AT FWD CARGO COMP. STA 500B STR 28R REF B737-7 SRM 51-40-02-0G-0 AND DWG#143A1210; [12] VERIFIED STEPS ; 9 ;10 ;& 11

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