Service difficulty report · Stringer Clip · Boeing 7377H4

Difficulty date
July 1, 2021
Submitted
August 11, 2021
Operation
Air carrier
Aircraft
N750SA
Make and model
Boeing 7377H4
Aircraft serial
29802
Aircraft time
75,691 hours, 44,551 cycles
Part
Stringer Clip
Condition
Corroded
Location
Bs 847 S27l
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 ON STRINGER CLIP AT AFT CARGO BAY BS847 LBL6 WL158. ; / [01] NO ALLOWABLE LIMITS FOR CORROSION ON STRINGER CLIP AT BS 847 STR 27 L. IAW SRM CH. 51-10-02-0G-0. PART REPLACEMENT NECESSARY.; [02] NO ALLOWABLE LIMITS FOR CORROSION ON STRINGER CLIP AT BS 847 STR 27 L. STRINGER IS (OUT OF LIMITS) IAW SRM CH. 51-10-02-0G-0. PART REPLACEMENT NECESSARY.; [03] REMOVED DAMAGED STRINGER CLIP IAW SRM CH. 51-20- 02. FABRICATED LOCATED AND DRILLED REPLACEMENT CLIP FROM BAC1493-856#7075T62 CLAD EXTRUSION. LOT #1214483 IAW BOEING DRAWING # 146A1010 TYPE: PL. REV:AC SRM CH 51-40-05. OK TO TREAT AND PRIME; [04] VERIFIED NO ALLOWABLE LIMITS FOR CORROSION ON STRINGER CLIP AT BS 847 STR 27 L. STRINGER CLIP IS (OUT OF LIMITS) IAW SRM 51-10-02-0G-0.<BR>VERIFIED FABRICATION; LOCATE AND DRILL OF REPLACEMENT CLIP FROM BAC1493-856#7075T62 CLAD EXTRUSION. LOT #1214483 IAW BOEING DRAWING # 146A1010 TYPE: PL. REV:AC; SRM CH 51-40-05. OK TO TREAT AND PRIME; [05] TREATED AND PRIMED STRINGER CLIP IAW SRM CH 51-20-01-0G-0. OK TO INSTALL.; [06] UPDATED MEASUREMENTS PARAMETERS- CORRECTED WL 158.; [07] VERIFIED TREATED AND PRIMED STRINGER CLIP IAW SRM CH 51-20-01-0G-0. OK TO INSTALL GIVEN; [08] INSTALLED STRINGER CLIP AT BS 847 LBL 6; WL 158 IAW SRM 51-40-02-0G-0 PARAGRAPH 4 B; [09] INSTALLED STRINGER CLIP AT BS 847 LBL 6; WL 158 IAW SRM 51-40-02-0G-0 PARAGRAPH 4 B; DWG 146A1281ID24 REV A; [10] ALL STEPS COMPLETE; [11] VERIFIED; STEP 9; [12] VERIFIED; STEP 9

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