Service difficulty report · Mount · Boeing 7378H4

Difficulty date
September 26, 2024
Submitted
October 22, 2024
Operation
Air carrier
Aircraft
N8507C
Make and model
Boeing 7378H4
Aircraft serial
41531
Aircraft time
26,311 hours, 13,166 cycles
Part
Mount
Condition
Corroded
Location
Zone 200
Stage of operation
IN
How discovered
V
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 L/H LAV; AFT OTBD MOUNT HAS CORROSION; STA 947.<[01] DEPTH OF DAMAGE PRIOR TO BLENDING=.030?. DAMAGE IS OUT OF LIMITS PER SRM 53-70-51-1A-1. ORIGINAL PART THICKNESS = .205?; REMAINING THICKNESS = .175?. MATERIAL LOSS = .030?.;[02] INSPECTED AS REQUIRED. CORRECTIVE ACTION #1;[03] LOCATED AND DRILLED NEW INTERCOSTAL BETWEEN STA?S 947-967; LBL 50 PER SRM 51-40-02;[04] DRILLED NEW INTERCOSTAL PER SRM 51-40-05 AND INSTALLED NUT PLATES PER SRM 51-40-02.;[05] INSPECTED C/A#4 OK TO INSTALL NEW INTERCOSTAL.;[06] INSTALLED NEW INTERCOSTAL PER SRM 51-40-02.;[07] 02 - INSPECTED PER [SRM 51-40-02-0G-0-B00069 (GENERAL - FASTENER INSTALLATION AND REMOVAL - AIRFRAME - PERMANENT)]

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