SDR AALA202201207528

Service difficulty report · Sump · Boeing 737823

Difficulty date: January 15, 2022
Submitted: January 20, 2022
Operation: Air carrier
Aircraft: N909NN
Make and model: Boeing 737823
Aircraft serial: 31159
Aircraft time: 27,583 hours, 11,474 cycles
Engine: Cfmint CFM567B242
System (JASC): 7261 · Turbine Engine Oil System
Part: Sump
Condition: Leaking
Location: Nr 1 Eng Oil
Part time: 27,583 hours, 11,474 cycles
Stage of operation: DE
How discovered: O
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

AIRCRAFT WAS GROUNDED: SHORTLY AFTER POWER REDUCTION ON DECENT, MUSTY TYPE OF ODOR WAS NOTICED ON FLIGHT DECK AND AFT CABIN. ODOR DISSIPATED SHORTLY BEFORE LANDING. MAINTENANCE ACCOMPLISHED SMOKE ODOR FUMES INITIAL TROUBLESHOOTING JOB CARD 08L00021001. ENGINE #1 OIL SUMP LEAK IDENTIFIED AS ODOR SOURCE, CONTAMINATING LEFT HAND PACK. ENGINE #1 REPLACED PER JOB CARD 08L40072003. ACCOMPLISHED SATISFACTORY ENGINE POWER RUNS. ODOR NOT PRESENT AFTER ENGINE POWER RUNS.