SDR SWAA2025091507045

Service difficulty report · Fitting · Boeing 7377H4

Difficulty date: August 21, 2025
Submitted: September 15, 2025
Operation: Air carrier
Aircraft: N964WN
Make and model: Boeing 7377H4
Aircraft serial: 36965
Aircraft time: 45,186 hours, 27,867 cycles
System (JASC): 5415 · Nacelle/Pylon, Attach Fittings
Part: Fitting
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

NUMBER 1 PYLON FITTING LOCATED 13 INCH AFT OF AFT ENG MOUNT FITTING IS GOUGED AND CRACKED. REMOVED PYLON FITTING AND PANELS 431CL;431CR; 433AL; 433AR; 431ER;431EL; 433DT 511BT IAW SRM 51-40-02-0G-0, INSTALLED A NEW PYLON FITTING AND PANELS 431CL;431CR; 433AL; 433AR; 431ER;431EL; 433DT 511BT IAW AMM 54-52-09-400-801, AMM 54-52-03-410-801, AMM 54-53-01-400-801, AND SRM 51-40-02-0G-0, STEP 7-8

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