Service difficulty report · Attach Angle · Boeing 7377H4

Difficulty date
May 11, 2021
Submitted
June 17, 2021
Operation
Air carrier
Aircraft
N732SW
Make and model
Boeing 7377H4
Aircraft serial
27864
Aircraft time
74,727 hours, 43,976 cycles
Part
Attach Angle
Condition
Corroded
Location
Bs 787
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 ATTACH ANGLE AT AFT CARGO BAY BS787 LBL6 WL153. ; / FABRICATED ATTACH ANGLE AT BS 787 LBL6 WL153 USING BAC 1490-2815#7075-T62 LOT# 1455929-2 PER SRM 51-40-05-0G-0; DWG 146A1320; DWG 146A7810. APPLIED A CHEMICAL CONVERSION COATING PER AMM 51-21-41-370-802.;INSTALLED ATTACH ANGLE BS787 LBL 6; WL 153; PER SRM 51-40-02-0G-0; DWG 146A7810.;PRIMERED ATTACH ANGLE PER AMM 51-21-72-370-804; OK TO INSTALL.;RECEIVED EXTRUSION FROM HEAT TREAT; P.O. #824916;REMOVED ATTACH ANGLE AT BS 787 LBL6 WL153 PER SRM 51-40-02-0G-0.;VERIFIED MEASUREMENT TABLE; ATTACH ANGLE FOUND TO BE OUT OF LIMITS AND REPLACEMENT PART PER SRM 51-10-02-0G;EVALUATED CORROSION ON ATTACH ANGLE BS787 LBL6 WL153 FOUND TO BE OUT OF LIMITS DUE TO NO ALLOWABLE LIMITS IN THE SRM AND REQUIRES REPLACEMENT PER SRM 51-10-02-0G-0;UPDATED MEASUREMENT TABLE;VERIFIED PRIMERED ATTACH ANGLE PER AMM 51-21-72-370-804; OK TO INSTALL.;VERIFIED INSTALL OF ATTACH ANGLE BS787 LBL 6; WL 153; PER SRM 51-40-02-0G-0; DWG 146A7810.;VERIFIED STEPS 5 AND 6

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