Service difficulty report · Engine · Boeing 737990ER

Difficulty date
August 21, 2022
Submitted
August 23, 2022
Operation
Air carrier
Aircraft
N472AS
Make and model
Boeing 737990ER
Aircraft serial
60580
Aircraft time
27,585 hours, 8,514 cycles
Engine
Cfmint CFM567B27E
Part
Engine
Part number
3051157090
Condition
Leaking
Location
#1 Engine
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

#1 ENGINE OIL TREND DATA SHOWS OIL CONSUMPTION HIGHER THAN EXPECTED. ENGINE POWER RUN REQUIRED. GROUNDED - YES. ACCOMPLISHED TSR STEPS 1 THROUGH 4, 6, AND 8. NUMEROUS LEAKS IDENTIFIED. FUEL PUMP, IDG, AND STARTER/N2 ROTOR DRIVE PAD DRAIN LINES LEAKING OIL. STARTER SHOWS EVIDENCE OF BLOWING OIL AND EDP/AGB DRIVE PAD HOUSING ASSY IS LEAKING OIL. THERE IS NO EVIDENCE OF OIL LEAKAGE AT THE AFT SUMP PRESSURE AND RETURN LINES AND THERE IS NO OIL IN THE EXHAUST AT THIS TIME. THE FOLLOWING WERE REPLACED: SEALOL SEALS FOR DRIVE PAD, FUEL PUMP, IDG + EDP. THE STARTER WAS REPLACED, HYD PUMP REPLACED, ALL INSTALLATION TEST PASSED. REF ASA LP 60399835 FOR LEAK CHECK OF SEALOL SEALS.