SDR SWAA2020101317349

Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date: September 21, 2020
Submitted: October 13, 2020
Operation: Air carrier
Aircraft: N498WN
Make and model: Boeing 7377H4
Aircraft serial: 32480
Aircraft time: 54,229 hours, 32,111 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

LEFT HORIZONTAL STAB INSPAR RIB ASSEMBLY STA 120.30; RIB 4; STIFFENER 3 HAS A CRACK AT LOWER AREA, MARKED 78-2. REPAIRED STIFFENER NR 3, RIB 4 AT LT HORIZONTAL STAB STA 120.30, IN REF B737 SRM 55-10-09-2R-4. NOTE: CRACK FOUND ON UPPER FWD OUTBOARD FLANGE. FIRST FASTENER HOLES WILL BE ACCOMPLISHED ON NR W173760-3000/0023.

More about the Boeing 737-7H4