Service difficulty report · Support Angle · Boeing 7377H4

Difficulty date
July 29, 2021
Submitted
September 14, 2021
Operation
Air carrier
Aircraft
N491WN
Make and model
Boeing 7377H4
Aircraft serial
33867
Aircraft time
53,758 hours, 31,898 cycles
Part
Support Angle
Condition
Corroded
Location
Bs 707 Lbl63
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 SUPPORT ANGLE AT PASSENGER CABIN BS707 LBL63 WL202. ; / [01] REMOVED FASTENER AT B.S 707 LBL63 WL202 IAW SRM 51-40-02-OG-O; [02] REMOVED CORROSION ON UPPER SURFACE OF ANGLE IN A 1'X1'X.004' AREA AT B.S 707 LBL63 WL202 IAW SRM 51-10-02-OG-0. NO SRM ALLOWABLE DAMAGE LIMITS EXISTS. ORIGINAL THICKNESS IS .080; MEASURED WITH ATS 1225; S/N: NSN; DUE 07/2022; ATS 2501 S/N: A19335647; DUE 03/2022; [03] VERIFIED CORROSION REMOVAL AND REMAINING THICKNESS. NO SRM LIMITS.; [04] EDIT TO STEP 2; ORIGINAL THICKNESS IS .071' IAW SRM 53-40-51-01-2; FIG 3; [05] VERIFIED; [06] UT INSPECTED BLEND IAW 737 NDTM PART 4 51-00-00 PROCEDURE 2; REMAINING THICKNESS IS 0.068' ADJACENT TO 0.071'. EQUIP ID#: ATS2031 S/N: 170515011; [07] PERFORMED GVI OF REWORK AREA- NO ADDITIONAL DAMAGE NOTED; [08] UPDATED MEASUREMENT TABLE; [09] REFER TO FAULT TTG8Q005ZHVL WHERE EA 21-153-02309 WAS ADDED AS A SUBTASK.; [10] VERIFIED REFER TO FAULT TTG8Q005ZHVL WHERE EA 21-153-02309 WAS ADDED AS A SUBTASK.

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