SDR AALA202003279002

Service difficulty report · Seal · Boeing 737823

Difficulty date: March 26, 2020
Submitted: March 27, 2020
Operation: Air carrier
Aircraft: N820NN
Make and model: Boeing 737823
Aircraft serial: 29559
Aircraft time: 32,200 hours, 13,011 cycles
Engine: Cfmint CFM567B243
System (JASC): 7261 · Turbine Engine Oil System
Part: Seal
Condition: Leaking
Location: Nr 2 Engine
Stage of operation: CR
How discovered: O
Nature of condition: K, J
Precautionary procedure: E, A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AIRCRAFT WAS GROUNDED: DIVERTED TO PHX ACCOUNT NO.2 ENG OIL QTY DECREASED TO 0 QTS OVER ABOUT ONE HOUR TIME. OIL PRESSRE THEN STARTED FLUCTUATIONS AND DROPPING. ENGINE WAS SHUT-DOWN AND EMERGENCY DECLARED. ACCOMPLISHED TII 70561619 AS REQUIRED. REPLACED OIL SEAL ASSEMBLY AND MATING RING DUE TOOIL LEAK AT DRAIN TUBE OF CRANK PAD. SERVICED ENGINE OIL AS REQUIRED. LEAK AND OPS CHECK GOOD AT THIS TIME. IAW ENGINE SHOP MAUNAL CFM 56-7B 72-63-00.