Service difficulty report · Strap · Boeing 7377H4

Difficulty date
May 20, 2021
Submitted
June 28, 2021
Operation
Air carrier
Aircraft
N207WN
Make and model
Boeing 7377H4
Aircraft serial
34012
Aircraft time
52,378 hours, 31,227 cycles
Part
Strap
Condition
Corroded
Location
Cargo Door Frame
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 FWD CARGO DOOR SURROUND STRUCTURE; INTERNAL FWD VERTICAL STRAP; RBL30; BS440; WL160 ; AREA BY S-25R / [01] REMOVED CORROSION ON INNER FAIL SAFE STRAP AT B.S 440 RBL 30 WL 160; W 1.2' L 1.6' PER SRM 53-30-15-1A-1; [02] VERIFIED REMOVAL OF CORROSION ON INNER FAIL SAFE STRAP AT B.S 440 RBL 30 WL 160; W 1.2' L 1.6' PER SRM 53-30-15-1A-1; [03] UT THICKNESS TESTED BLENDED AREA PER 737NDT PART 4 51-00-00 PROCEDURE 2. LOWEST REMAINING THICKNESS IS .142'. CAL ID ATS2342 E650; [04] REMOVED VERTICAL STRAP AT BS 440; DUE WAS FOUND OUT OF LIMIT IAW SRM 51-40-02; [05] RECEIVED PART FROM OUT SIDE SERVICE MACHINE SHOP FABRICATION HFAB53-SP-012 (BAC1520-2799#7075T351) LOT#1196226 PER DRAWING 143A8206 IAW CUSTOMER RO NO. 826815-SWA JOB # 540270; [06] LOCATED AND DRILLED NEW VERTICAL STRAP AT FCB BS 440 RH IAW SRM 51-40-05-0G-0 AND DRAWING # 143A8206.<BR>OK TO TREAT AND PRIME; [07] CORRECTED ITEM 4; PART WAS FOUND OUT OF LIMIT IAW SRM 53-30-15-1A-1

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