Service difficulty report · Strap · Boeing 7377H4

Difficulty date
March 10, 2023
Submitted
April 18, 2023
Operation
Air carrier
Aircraft
N281WN
Make and model
Boeing 7377H4
Aircraft serial
36528
Aircraft time
51,516 hours, 31,045 cycles
Part
Strap
Condition
Corroded
Location
Zn 100 Fus Lower
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 AFT PAX CABIN FLOOR STRUCTURE TENSION STRAP FROM STA 1016 TO 1016+10; LBL 3; WL 208.1.<[01] NO ALLOWABLE DAMAGE LIMITS FOUND IN SRM FOR THIS ITEM. THE STRUCTURAL ITEMS THAT DO NOT HAVE ENTRIES ARE CALLED REPAIRABLE BY REPLACEMENT PER SRM 51-10-02 PARAGRAPH 9;[02] REMOVED TENSION STRAP FROM BS 1006 TO BS 1029; LBL 3; WL 208 PER SRM 51-40-02;[03] VERIFIED CORRECTIVE ACTION 1 AND 2;[04] LOCATED AND DRILLED TENSION STRAP AT BS 1006 - BS 1029; WL 208.1; LBL 3 .FROM 7075-T6 X 0.071' CLAD SHEET LOT # 1497836-1. IAW SRM 51-40-05 AND DWG 147A5620 SH 2. OK TO TREAT AND PRIME.;[05] VERIFIED CORRECTIVE ACTION 4.<BR>OK TO TREAT AND PRIME;[06] APPLIED CHEMICAL CONVERSION COATING AND PRIMER AT NEW TENSION STRAP PER SRM 51-20-01 AND SOPM 20-41-02. OK TO INSTALL;[07] VERIFIED CORRECTIVE ACTION 6.<BR>OK TO INSTALL;[08] INSTALLED TENSION STRAP AT BS 1006- BS 1029; LBL 3; WL 208.1 PER SRM 51-40-02 AND DWG 147A5600 SH 1;[09] VERIFIED CORRECTIVE ACTION 8;[10] VERIFIED MEASUREMENT TABLE

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