Service difficulty report · Hmu · Boeing 7377H4

Difficulty date
November 29, 2025
Submitted
December 2, 2025
Operation
Air carrier
Aircraft
N217JC
Make and model
Boeing 7377H4
Aircraft serial
34232
Aircraft time
67,723 hours, 40,419 cycles
Engine
Cfmint CFM567B242
Part
Hmu
Condition
Failed
Location
Nr 1 Engine
Stage of operation
TX
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

AFTER EXITING RUNWAY (AFTER LANDING) NR 1 ENGINE FAILED. FAIL ON ENGINE INSTRUMENTS. NR 1 GEN OFF LINE AT SAME TIME. NR 1 ENGINE SPOOLS UP MUCH SLOWER ON TAKEOFF COMPARED TO NR 2 ENGINE. NR 1 ENG FUEL PUMP & HMU R & R IAW MT 773-11-00. PS3 CONNECTOR FOUND DISCONNECTED. PS3 CONNECTED IAW AMM 73-21-60. TEST 15; 85% N1 LEAK CHECK GOOD IAW AMM 71-00-00.

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