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 Lbl62
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 LBL62 WL202. ; / [01] REMOVED FASTENER ON ANGLE AT B.S 707 LBL 62 WL 202 IAW SRM 51-40-02-OG-0; [02] REMOVED CORROSION ON UPPER SURFACE OF ANGLE IN A 1'X1'X.004' AREA 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] AREA OF BLEND WAS AT B.S 707 LBL62 WL202 ON UPPER SURFACE OF ANGLE; [04] VERIFIED; [05] VERIFIED CORROSION REMOVAL- NO SRM LIMITS; [06] EDIT TO STEP 2; ORIGINAL THICKNESS IS .071' IAW SRM 53-40-51-01-2; FIG 3; [07] VERIFIED; [08] 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; [09] PERFORMED GVI OF REWORK AREA- NO ADDITIONAL DAMAGE NOTED; [10] UPDATED MEASUREMENT TABLE; [11] REFER TO EA 21-153-02309 SUMMARY REQUIREMENT; BARCODE: TTG8Q006EMYR; [12] REPAIRED DAMAGE ON SUPPORT ANGLE AT PASSENGER CABIN BS 707; LBL 62; WL 202 PER EA 21-153-02309 (N491WN ATS(PAE) REPAIR - SECTION 44 PRESSURE FLOOR WEB CLOSEOUT ANGLES) [TTG8Q006EMYR].; [13] VERIFIED ACTION 12; [14] VERIFIED ACTION 12

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