Service difficulty report · Fastener · Boeing 7378H4

Difficulty date
November 14, 2025
Submitted
December 11, 2025
Operation
Air carrier
Aircraft
N8523W
Make and model
Boeing 7378H4
Aircraft serial
36969
Aircraft time
29,314 hours, 14,696 cycles
Engine
Cfmint CFM567B27E
Part
Fastener
Condition
Cracked
Location
Zone 400
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

RIGHT INLET COWL OUTER LIP SKIN FASTENER AT 6 O'CLOCK, HEAD CRACKED. REMOVED AND OVERSIZED TO 1ST OVER RT INLET COWL OUTER LIP SKIN FASTENER AT 6 O'CLOCK POSITION IAW SRM 54-10-01-1A-2. PERFORMED NDT OF FASTENER HOLE PER NDT MANUAL PART6 51-00-00 PROCEDURE 11. NO DEFECTS FOUND. OKAY TO INSTALL NEW FASTENER. INSTALLED NEW FASTENER PER SRM 54-10-01-1A-2. INSPECTED AND VERIFIED. CA 3 COMPLIED WITH AND OKAY TO INSTALL PANEL 412/422AB. REINSTALLED PANEL 412/422AB IAW SRM 51-40-02; SEALED PER AMM 51-31-00, AND APPLIED DECORATIVE EXTERIOR FINISH IAW AMM 51-21-99.

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