Service difficulty report · Strap · Boeing 7378H4

Difficulty date
November 4, 2023
Submitted
December 7, 2023
Operation
Air carrier
Aircraft
N8556Z
Make and model
Boeing 7378H4
Aircraft serial
63583
Aircraft time
19,574 hours, 9,791 cycles
Part
Strap
Part number
UNKNOWN
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

AFT CARGO FLOOR PANEL SPLICE STRAP HAS CORROSION ON UPPER SURFACE AROUND SEVERAL N/P HOLES AT STA 772. MRKD<[01] AFT CARGO COMPARTMENT DAMAGE ON SPLICE TEE ASSEMBLY UPPER SURFACE IN STA 767 + 5 RBL 22; LBL 22; WL 155 WAS FOUND TO BE OUT OF ALLOWABLE LIMITS IAW SRM 53-00-53-1A-2. REMOVED AND REPLACED SPLICE STRAP TEE ASSEMBLY IAW SRM 51-40-02; AMM 20-50-11.;[02] REJECT: FAULT HAS SEVERAL DISCREPANCIES.<BR><BR>1. MEASUREMENT #1 FOR RII SHOULD BE 'NO' AS PART IS NOT LISTED AS A PSE AND THEREFORE REPLACEMENT SHOULD HAVE NO RII REQUIREMENT.<BR>2. MEASUREMENT #2 FOR MAJOR REPAIR SHOULD BE 'NO'.<BR>3. CORRECTIVE ACTION #1 REFERENCES 'AMM 20-50-11 STANDARD TORQUE VALUES' BUT THERE IS NO TORQUE WRENCH LISTED IN THE TOOL REQUIREMENTS SECTION OF THE FAULT.

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