Service difficulty report · Oil System · Boeing 7379

Difficulty date
October 12, 2025
Submitted
October 14, 2025
Operation
Air carrier
Aircraft
N27503
Make and model
Boeing 7379
Aircraft serial
43434
Aircraft time
18,650 hours, 6,169 cycles
Engine
Cfmint LEAP1B28
Part
Oil System
Condition
Leaking
Location
Nr 1 Engine
Stage of operation
NR
How discovered
O
Nature of condition
K
Precautionary procedure
O

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

What was found

OIL LEAKING FROM NR 1 ENG OIL LEAK IS ONLY COMING FROM C-SUMP DRAIN #1 ENG. OIL CONSUMPTION IS BELOW .20 QTS PER HOUR. PERFORMED IDLE LEAK CHECK NO ACTIVE OIL LEAKS OR FUMES OR FOGS AT IDLE. PLACE ON 5 CYCLE DIP IN REF TO AMM 71-71-00-200-801-G00. TOMC APPROVES DIP FOR #1 ENG C SUMP DRAIN OIL LEAK TO CONTINUE IN SERVICE FOR 5 FLIGHT CYCLES IAW AMM 71-71-00-200-801-G00 TOMC-APPROVAL FROM SC1ELBYC COMMENT TA M&E: 42-9979-8-0119 S/N: 2356 LIMIT:TERMINATING LABOR HOURS: 0003 GROUND TIME: 0005 QC REVIEW C/W AMM 71-71-00-200-801-G00 ,RAN THE ENGINE #1 AT IDLE POWER FOR 10 MINUTES,THE LEAK IS LESS THAN THE SERVICEABLE LIMIT, NO MAINTENANCE ACTION IS NECESSARY .THIS ACTION CLEARS DIP TOMCQC REV PERFORMED

More about the Boeing 737-9