SDR SWAA2020100515531

Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date: September 10, 2020
Submitted: October 5, 2020
Operation: Air carrier
Aircraft: N499WN
Make and model: Boeing 7377H4
Aircraft serial: 32481
Aircraft time: 54,217 hours, 32,098 cycles
System (JASC): 5510 · Horizontal Stabilizer Structure
Part: Stiffener
Condition: Cracked
Location: Horizontal Stab
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

RIGHT HAND HORIZONTAL STABILIZER INSPAR RIB AT STAB STA 129.5, 2ND VERTICAL STIFFENER IS CRACKED. TRIMMED OUT THE DAMAGE PART AT RT HORIZ STAB INSPAR RIB AT STA 129.5, 2ND VERTICAL STIFFENER AND INSTALLED REPAIR PARTS, IAW SRM 55-10-09-2R-4 88920U 19SEP20.

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