SDR CALA2025072506920

Service difficulty report · Line · Boeing 737900ER

Difficulty date: July 20, 2025
Submitted: July 25, 2025
Operation: Air carrier
Aircraft: N37420
Make and model: Boeing 737900ER
Aircraft serial: 33457
Aircraft time: 53,284 hours, 18,808 cycles
Engine: Ge CFM567B24
Engine time: 68,683 hours, 25,662 cycles
System (JASC): 7261 · Turbine Engine Oil System
Part: Line
Condition: Leaking
Location: Nr 1 Eng Oil
Stage of operation: CR
How discovered: O
Nature of condition: K, J
Precautionary procedure: A

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

What was found

OIL QTY DROPPED STEADILY TO 0 PERCENT. W/IN APPRO 20MIN OIL PRES S FLUCTUAT TO RED LIMIT. REMOVED AND REPLACED #1 ENGINE REF AMM 71-00-02-400-802-F00, ALL OPS CHECKS NORMAL, NO LEAKS NOTED.VERIFIED #1 ENGINE CHANGE IAW GMM 09-25-05, MONITORED DYNAMETERS, CONNECTIONS, HOSES, CLAMPS, MOUNT BOLTS, INSTALLATION AND SECURITY. LEAK AND OPS CHECKS, ALL TESTS PASSED, C/W RII.

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