SDR CALA0200030

Service difficulty report · Seal · Boeing 737524

Difficulty date: January 22, 2002
Submitted: January 24, 2002
Operation: Air carrier
Aircraft: N37615
Make and model: Boeing 737524
Aircraft serial: 27328
Aircraft time: 23,002 hours, 12,259 cycles
Engine: Ge CFM563B1
Engine time: 23,002 hours, 12,259 cycles
System (JASC): 7261 · Turbine Engine Oil System
Part: Seal
Condition: Leaking
Location: Nr 2 Engine
Stage of operation: CL
How discovered: O
Nature of condition: K, B
Precautionary procedure: A

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

What was found

SMOKE ENTERED THE COCKPIT AND CABIN ON TAKEOFF FROM EWR. THE APU WAS RUNNING AND BOTH ENGINE BLEEDS WERE ON WITH BOTH PACKS OPERATING. THE AIRCRAFT WAS RETURNED TO EWR WHERE IT LANDED WITHOUT INCIDENT. BOTH ENGINES WERE BORESCOPED. MAINTENANCE FOUND THE AIR/OIL SEAL LEAKING AND OIL HAD ENTERED THE NR 2 ENGINE COMPRESSOR. THE NR 2 ENGINE WAS REMOVED AND REPLACED. A DUCT BURNOUT WAS PERFORMED AND BOTH PACK COALESCER BAGS WERE REMOVED AND REPLACED. A HIGH POWER ENGINE RUN WAS PERFORMED AND OPERATIONAL CHECKS WERE GOOD.