Service difficulty report · Fitting · Boeing 7377H4

Difficulty date
September 24, 2024
Submitted
October 29, 2024
Operation
Air carrier
Aircraft
N498WN
Make and model
Boeing 7377H4
Aircraft serial
32480
Aircraft time
65,864 hours, 39,268 cycles
Part
Fitting
Condition
Corroded
Location
Zone 300
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

CORROSION FOUND AT VERTICAL FIN FRONT SPAR FITTING LH BOLT HAS PITTING CORROSION.<[01] REMOVED AND REPLACED BOLT AT VERTICAL FIN FRONT SPAR FITTING LH.<BR>REF: AMM 55-30-00-000-801 AND AMM 55-30-00-400-801.<BR>TOOL USED<BR>-TORQUE WRENCH: B/C: 175286; CAL DUE DATE: 07/02/2025.<BR>-TORQUE WRENCH: B/C: 164372; CAL DUE DATE: 06/01/2025.;[02] RII -- VERIFIED STEP 1.

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